My application is filed, and I have been given my MC Number. Can I begin interstate operations?

Unfortunately, no. Every brand-new MC Number must go through a mandatory protest period before the FMCSA activates it for use. Additionally, there are many other requirements that must also be in place before someone can legally operate using their MC Number. 

To successfully activate the MC Number and begin interstate operations, the FMCSA requires every new authority to complete a 21-day protest period. You must also have a valid BOC-3 on file. Finally, your insurance company will be required to file proof of insurance with the FMCSA, and the insurance coverage limits must meet the minimum requirements for the authority category you fall in. You have up to 90 calendar days to purchase a qualifying insurance policy and have your insurance company file proof of coverage. If insurance is not on file within that time frame, the FMCSA will automatically dismiss your application, and you will have to reapply and repay the $300 fee.

Why You Need an MC Number for Interstate Trucking

If you plan to operate across state lines, you will need more than just a DOT Number. The Federal Motor Carrier Safety Administration (FMCSA) requires for-hire carriers transporting cargo in interstate commerce to obtain an MC Number, also known as motor carrier authority.

This number is your legal authorization to operate. Without it, you are not permitted to haul freight across state lines, work with brokers, or secure appropriate insurance for interstate loads. It is a foundational component of your compliance setup and should be prioritized when starting your trucking business.

What to Do After Receiving Your MC Number

After you apply for and receive your MC Number, your authority does not become active immediately. You must complete several mandatory steps before you are legally authorized to begin hauling freight across state lines.

21-Day Protest Period

‍Following submission, the FMCSA imposes a mandatory waiting period. This timeframe allows for any formal objections to your application and provides the opportunity to complete all required filings.

BOC-3 Filing‍

You are required to file a BOC-3 form, which designates a process agent in each state in which you operate. This filing is essential to activate your authority and ensures that legal documents can be properly served on your behalf.

Failure to complete these steps will leave your MC Number inactive, making it unlawful to conduct interstate operations.

The Importance of Filing Proof of Insurance

In addition to the BOC-3, your insurance provider must file proof of coverage directly with the FMCSA. The coverage must meet or exceed federal minimums based on your operation type. Typically, this includes:

• Public liability insurance
  
• Cargo insurance (depending on the type of freight transported)
  

You have up to 90 calendar days from the date your MC Number is issued to file proof of insurance. Missing this deadline may result in serious consequences.

What Happens If You Miss the Insurance Deadline

If the required insurance documentation is not filed within 90 days, the FMCSA will automatically dismiss your application. Both your DOT Number and MC Number will be voided. You will then be required to reapply and pay all associated registration fees again.

This error can postpone your business launch by several weeks or even months—particularly if you are already under contract with a broker or customer. Therefore, it is essential to coordinate with your insurance provider early in the application process.

Understanding Commercial Zone and Intrastate Exceptions

Not every carrier requires interstate authority. If your operations are confined to a single state or a designated commercial zone (such as metro border areas), you may qualify for an exemption from obtaining an MC Number.

However, for most carriers seeking to expand operations or partner with freight brokers, interstate authority is critical. It enables broader access to loads, customers, and business growth opportunities.

Getting Your Authority Fully Activated and FMCSA-Compliant

Your MC Number is not considered active until all compliance steps are complete. These include:

• A valid DOT Number
  
• A properly filed BOC-3
  
• Proof of insurance on file with the FMCSA
  
• Completion of the 21-day protest period

Once all requirements are fulfilled, the FMCSA will activate your authority, and you will be legally permitted to operate. From that point forward, your focus should shift to maintaining compliance through regular vehicle inspections, updated driver qualification files, Hours of Service tracking, and safety audit preparedness.

Get Help Activating Your MC Number or Filing Your BOC-3 and Insurance

Ensure your authority is activated properly from the start and work with a setup specialist.