Michigan Livestock Trailer Laws: What Every Hauler Needs to Know Before Hitting the Road

Hauling animals on Michigan roads is not as simple as loading up and pulling out of the driveway. Whether you are moving cattle to a sale barn, transporting goats between pastures, or shipping hogs to a processor, the state has a specific set of rules that govern how your trailer must be registered, how it must be built, how much it can weigh, and who is legally allowed to drive it.

Getting any one of those details wrong can result in a roadside out-of-service order, fines, or worse — animals in distress with no legal path forward. This guide walks you through every major category of transporting livestock laws in Michigan so you can haul confidently and legally.

Livestock Trailer Registration and Identification Requirements in Michigan

Before your trailer ever reaches a public road, it needs to be properly registered and identified. Michigan’s requirements in this area depend heavily on how you use your trailer — whether you are a private farmer hauling your own animals or a licensed livestock trucker moving animals for others.

Who counts as a livestock trucker under Michigan law? A “livestock trucker” under Michigan law means a person, not otherwise licensed under the act, that engages in the business of transporting livestock not owned by the person or the person’s employer from one premises to another. If that definition applies to you, you are required to hold a license from the Michigan Department of Agriculture and Rural Development (MDARD).

Not every person who occasionally hauls someone else’s animals qualifies as a livestock trucker, however. A person is not considered a livestock trucker solely because they haul livestock on an occasional basis for persons participating in a livestock exhibition, fair, trail ride, youth livestock event, or similar activity; haul livestock on an incidental basis in connection with another business such as a veterinary practice or stable operation; or haul livestock for another person fewer than six times within the preceding 12 months.

Vehicle permit placement. Every dealer, broker, livestock trucker, or agent licensed under the act and carrying on business under the license must at all times keep a copy of the license in each vehicle used for transporting livestock. Additionally, each person licensed under the act who uses a vehicle, trailer, or other conveyance for transporting livestock must place and visibly maintain the required vehicle permit on the upper forward corner of the left side of the vehicle, trailer, or other conveyance.

Farm plates and registration options. Michigan allows qualifying farm operations to use farm plates, which carry specific restrictions. A farm plate may be used by a farmer hauling livestock or farm equipment for other farmers for remuneration in kind or in labor, but not for money. Farm plates cannot be used on vehicles transporting products in support of retail sales.

Unless using a farm plate, certain commercial motor vehicles must have an Elected Gross Vehicle Weight (EGVW), including a pickup truck or truck with an empty weight of more than 8,000 lbs. with or without a trailer; a truck under 8,000 lbs. empty weight towing a non-recreational trailer of any size; and road tractors and truck tractors, unless towing a recreational trailer.

Pro Tip: Keep a copy of your MDARD license or farm plate documentation in every tow vehicle you use. Inspectors from the department, sheriffs, and state police all have authority to request it during a stop.

Michigan cattle moving to show, sale, or exhibition also carry an identification requirement tied to registration. All Michigan cattle moving to show, sale, or exhibition on or after March 1, 2007 are required to have an official RFID ear tag. Make sure your animals are tagged before you load — not after you arrive. You may also want to review livestock disease reporting requirements in Michigan alongside your transport documentation, since both sets of rules are often enforced together by MDARD.

Structural and Safety Standards for Livestock Trailers in Michigan

Michigan enforces structural and mechanical standards for livestock trailers through a combination of state vehicle code requirements and federally adopted Motor Carrier Safety Regulations. Understanding which framework applies to your rig is the first step.

The Michigan Motor Carrier Safety Act of 1963 adopts the federal commercial motor vehicle definition found in 49 CFR 383.5 for vehicles operated in intrastate commerce. This means that if your livestock trailer meets the federal definition of a commercial motor vehicle, federal structural standards apply even when you never cross a state line.

Coupling and towing device requirements. Michigan restricts the number of trailers that may be towed and sets standards for the connecting devices. Michigan permits certain vehicles to tow two trailers and requires those trailers to employ fifth wheel mechanisms. There are three exceptions to the fifth wheel requirement: the recreational combination of pickup truck, camper, and boat trailer; a certain type of garbage truck and trailer combination; and the farm tractor and two wagons combination.

Safety chains. For vehicles meeting the definition of a commercial motor vehicle, the Federal Motor Carrier Safety Regulations require the use of two safety chains, one on each side, or one chain in a bridle configuration. Check that your chains are properly rated and attached before every trip.

Annual inspection requirements. Farmers must comply with the annual vehicle inspection requirements in Part 396. A sticker or inspection form must be on any commercial motor vehicle — power unit and any towed units — when in operation. Persons performing the inspection must meet the qualifications specified in the regulations. Proof of the inspection for the trailer may be kept in the power unit, provided it is made available upon request of a police officer.

Every commercial motor vehicle must pass a periodic annual inspection at least once every 12 months, performed by a qualified inspector. The inspection must cover all major systems: brakes, steering, suspension, tires, wheels, lights, reflectors, windshield, horn, mirrors, coupling devices, and emergency equipment.

Important Note: The annual inspection sticker or report must travel with the trailer on every trip. If an officer asks for it and you cannot produce it, that alone can trigger an out-of-service order.

Width standards. The total outside body width of a trailer or semitrailer shall not exceed 102 inches. Standard livestock trailers are typically built within this limit, but any custom modifications — extended side panels, added feed racks — should be measured before road use. If your load or equipment exceeds this width, you will need a special oversize permit from MDOT. Learn more about related Michigan MDOT trucking regulations and permits.

Size, Weight, and Load Limits for Livestock Trailers in Michigan

Michigan’s weight laws are layered, and livestock haulers interact with several different tiers depending on their route, axle configuration, and whether they qualify for agricultural exemptions.

Standard gross weight limits. The general legal gross weight limit on Michigan roads is 80,000 lbs. for a standard five-axle combination. Permits are required for vehicles or loads over 13’6″ in height. Plan your route accordingly, especially when hauling tall animals such as horses or cattle in double-deck trailers.

Agricultural weight exemption. Michigan provides a meaningful break for livestock and farm product haulers. Michigan increases axle load limits by 10 percent for vehicles carrying farm products from harvest sites to the first point of delivery on Michigan roads. Livestock qualifies as a farm product for this purpose, which means you may be able to run slightly heavier on the axles when moving animals from the farm to the first point of delivery — such as a sale barn or processor — without a special permit.

Frost law and seasonal weight restrictions. During spring thaw, Michigan imposes reduced loading periods on local roads. During reduced loading (or “Frost Law”) on local roads — not state highways — a person transporting agricultural commodities may obtain a permit from the county road commission to run normal loading weights. This permit must be applied for not less than 48 hours prior to the movement and must contain the route, date/time, and maximum speed.

Oversize load requirements. If your loaded trailer exceeds standard legal dimensions, Michigan requires oversize load signage. “Oversize Load” signs are required on the front of the vehicle and on the rear of the load for any overdimensional load. 18-inch red flags are required for any overhang over 4 feet and at the four corners and widest point of any oversize load. Two flashing or rotating amber lights are required at the extreme rear of any oversize load.

Key Insight: The 10 percent axle weight exemption for farm products applies from harvest site to the first point of delivery only — not for return trips or movements between processing facilities. Know your route’s starting and ending points before claiming the exemption.

Semitrailer length also has specific rules. Semitrailers longer than 50 feet must have a wheelbase of 37 to 41 feet, measured from the kingpin coupling to the center of the rear axle or to the center of the rear axle assembly. If you are pulling a long stock trailer behind a semi, confirm your wheelbase falls within this range.

Ventilation, Flooring, and Animal Space Requirements in Michigan

Michigan’s Generally Accepted Agricultural and Management Practices (GAAMPs), published by the Michigan Commission of Agriculture and Rural Development, set the baseline expectations for animal welfare during transport. These practices carry legal weight under Michigan’s Right to Farm Act and reflect the state’s minimum standards for humane transport.

Ventilation. Transport vehicles must provide ventilation and a floor surface to minimize slipping. For enclosed livestock trailers, this means ensuring that side vents, roof vents, or slat openings allow adequate airflow at highway speeds and during stops. Livestock trucks are designed for safely moving animals and are equipped with secure compartments, ventilation systems, and loading ramps. They ensure livestock welfare during transit to markets or pastures, reducing stress-related losses.

Flooring. Non-slip flooring is not optional — it is a core animal welfare requirement under Michigan’s GAAMPs. Rough-cut wood, ribbed aluminum, or rubber matting are all commonly accepted materials. Smooth metal flooring without traction surfaces is a red flag during both welfare inspections and MDARD audits. Animal injuries, bruises, and carcass damage can result from improper handling of animals during transport.

Weather and stress considerations. Transport and handling stresses can be aggravated greatly by adverse weather conditions, especially when the weather is changing rapidly. On hot summer days, this means ensuring your trailer’s ventilation is not blocked by tarps or side panels. In winter, it means balancing wind protection with air circulation so animals do not overheat from body heat in an enclosed space.

Feed and water on long hauls. Water and feed should be readily available for long trips as described in Federal Regulations — the Transportation of Animals statute from the U.S. Code (49 USC Sec. 80502). Federal law under the 28-Hour Law requires that livestock transported by vehicle across state lines be unloaded, fed, watered, and rested for at least five consecutive hours after 28 consecutive hours of confinement. While this federal rule targets interstate transport, Michigan’s GAAMPs encourage the same welfare approach for intrastate hauls.

Common Mistake: Covering trailer vents with tarps or plywood to block wind during cold hauls can cause dangerous heat buildup from animal body heat. Use purpose-built wind deflectors that maintain airflow rather than blocking it entirely.

Animal density. While Michigan does not publish a rigid square-footage-per-animal table in its statutes, the GAAMPs and federal transport guidelines both emphasize that animals must be able to stand naturally, balance during transit, and not be so tightly packed that they cannot avoid injury from falls or shifting. Overstocking a trailer is one of the most common animal cruelty triggers during transport. If you want to understand how these standards connect to broader Michigan animal welfare law, see Michigan’s animal cruelty laws.

Livestock species covered under Michigan’s transport rules include a broad range. Animals or livestock under Michigan law includes horses, ponies, mules, cattle, calves, swine, sheep, poultry, privately owned cervids, ratites, aquaculture species, and goats. If you raise goats specifically, you may also want to review goat ownership laws in Michigan for the full picture of your obligations.

CDL and Driver License Requirements for Hauling Livestock in Michigan

One of the most misunderstood areas of transporting livestock laws in Michigan is exactly when a Commercial Driver’s License is required — and when it is not. The answer depends on the weight of your combination, whether you are a farmer or a for-hire hauler, and how far from your farm you are operating.

Standard CDL thresholds. A commercial driver’s license is needed if you are operating a vehicle with a gross vehicle weight rating of 26,001 pounds or more; towing a trailer or other vehicles with a GVWR of 10,001 pounds or more with a gross combination weight rating of 26,001 pounds or more; designed to transport 16 or more people including the driver; or carrying hazardous materials in amounts requiring placarding.

A Class A CDL authorizes combination vehicles with a Gross Combination Weight Rating of 26,001 pounds or more, provided the towed vehicle weighs 10,001 pounds or more. This classification covers livestock carriers moving animals long distances.

The farmer CDL exemption. Farmers operating their own vehicles within a defined radius receive important relief from standard CDL requirements. The only exemptions regarding the requirement for a CDL in Michigan include farmers operating vehicles within a 150-mile radius of their farm.

Federal law reinforces and expands this exemption for “covered farm vehicles.” Under federal law, a CDL is not required for operators of covered farm vehicles with a gross vehicle weight rating, gross combination weight rating, GVW, or GCVW of 26,001 pounds or less in all of Michigan or in interstate transportation. For covered farm vehicles greater than 26,001 GVWR, GCWR, GVW, or GCVW, you will not need a CDL when operating in Michigan or across state lines within 150 miles of the farm or ranch, provided the vehicle has a Michigan registration.

What qualifies as a covered farm vehicle? A “covered farm vehicle” must be registered in a state with a license plate or other designation that allows law enforcement officials to identify it as a farm vehicle; operated by the owner or operator of a farm or ranch, or an employee or family member of an owner or operator; and used to transport agricultural commodities, livestock, machinery, or supplies to or from a farm or ranch.

The Michigan F-endorsement. Michigan offers a special F-endorsement as an alternative to a full CDL for qualifying farmers. To operate a combination of vehicles with a power unit that exceeds 26,000 lbs., a farmer must obtain the F-endorsement. To use the F-endorsement, however, the farmer must comply with the same four qualifying conditions as a covered farm vehicle. The F-endorsement is a Michigan exception to the CDL requirements that has been recognized by USDOT. As such, the F-endorsement does not require drug and alcohol testing.

Driver Type	Weight / Situation	License Required
Private farmer	Covered farm vehicle, within 150 miles of farm	Standard operator’s license
Private farmer	Power unit over 26,000 lbs., not for hire	F-endorsement on chauffeur’s license
For-hire livestock trucker	GCWR over 26,001 lbs., towed unit over 10,000 lbs.	Class A CDL required
Any driver	Hauling hazardous materials requiring placards	CDL with H or X endorsement
Driver age 18–20	Any commercial vehicle	CDL valid for intrastate Michigan only

If the farm vehicle is hauling a hazardous material in a quantity requiring placarding, such as anhydrous ammonia, the driver needs both the CDL and an H or X hazardous endorsement. Drivers between the ages of 18 and 21 can operate a commercial vehicle only within Michigan. You must be at least 21 to operate a commercial vehicle across state lines or to transport hazardous materials in amounts requiring placarding.

For-hire livestock truckers who haul for money — not just in-kind labor — lose access to farm exemptions. Farmers must have a CDL when they transport hazardous materials in an amount requiring placarding. A farmer who contracts to transport freight is “hauling for hire” and subject to all commercial regulations. Review the full Michigan CDL application requirements from the Secretary of State if you are unsure which category applies to you.

Passing Roadside Inspections With a Livestock Trailer in Michigan

A roadside inspection can happen at any time — at a weigh station, a port of entry, or during a routine traffic stop. Knowing what inspectors look for and having your paperwork in order before you leave the farm is the best way to avoid costly delays and out-of-service orders.

Who conducts inspections and where. Inspections may be conducted at a variety of locations, such as weigh stations, border checkpoints, bus terminals, a carrier’s terminal, or when a law enforcement official stops a commercial motor vehicle. All inspectors must be certified to conduct roadside inspections as outlined by the Commercial Motor Vehicle Safety Alliance (CVSA).

CVSA developed the North American Standard Inspection Criteria, which outline procedures based on the level of inspection conducted. Level I is the most comprehensive and covers both the driver and the vehicle in full detail. Level II covers a walk-around vehicle inspection. Livestock trailers are subject to all levels depending on the officer’s determination.

What happens when violations are found. Any driver who receives a roadside inspection report is required to deliver it to the motor carrier within 24 hours. If a vehicle is declared out-of-service, violations or defects must be corrected before the vehicle may operate again. Carriers must sign and return the completed roadside inspection report within 15 days of the inspection, verifying all violations have been corrected. A copy of this report must be retained by the carrier for 12 months following the date of inspection.

Top causes of out-of-service orders on trailers. FMCSA data consistently shows that trailer-related violations make up about 25% of all out-of-service orders during roadside inspections. Brakes and tires are the usual culprits. For livestock trailers specifically, inspectors also look at lighting, coupling devices, and load securement.

Pro Tip: Complete a written pre-trip inspection of your trailer before every haul — brakes, lights, tires, coupling devices, and floor condition. Keep a log. If you are stopped, a documented pre-trip record shows the inspector you take compliance seriously and can work in your favor.

Documents to have on hand. Before you pull onto a public road with a livestock trailer, make sure you have the following accessible in the cab:

• Current trailer registration
• Proof of annual vehicle inspection (sticker on trailer or form in cab)
• MDARD livestock trucker or dealer license, if applicable
• Vehicle permit displayed on the upper forward left corner of the trailer
• Driver’s license or CDL with any required endorsements
• Medical examiner’s certificate if operating a commercial motor vehicle
• Bill of lading or shipping papers describing the animals and their origin

Covered farm vehicle designation helps at inspections. Beginning October 1, 2015, new federal highway provisions became enforceable in Michigan by local law enforcement but provided a number of exceptions from federal regulations regarding covered farm vehicles. If your vehicle carries a farm plate or other state-issued farm vehicle designation, officers can identify it immediately, which often streamlines the inspection process. Make sure your plate is current and clearly visible.

Annual inspection recordkeeping. The completed annual inspection report must be retained on file by the motor carrier for 14 months. A copy must be kept on the vehicle or be accessible electronically during operation. Do not wait until you are stopped to discover your annual inspection paperwork has expired or is sitting in a file at home.

Michigan livestock transport rules intersect with a broader web of animal and agricultural law. If you are also dealing with disease testing for animals you are moving, see Michigan’s brucellosis laws for cattle-specific health certificate requirements that often accompany transport paperwork. And if you are importing animals from out of state, review Michigan’s pet and animal import laws to confirm what health documentation must travel with your load.

Staying compliant with transporting livestock laws in Michigan means keeping your trailer legal, your paperwork current, and your animals properly cared for from the moment you load to the moment you arrive. A little preparation before each trip is far less costly than an out-of-service order on the side of a Michigan highway. For the most current regulatory guidance, consult the Michigan Department of Agriculture and Rural Development and the Michigan Secretary of State’s CDL resources directly.