What is the primary purpose of the MCS-90 endorsement?

The primary purpose of the MCS-90 endorsement is to amend the trucker's auto liability policy to comply with the requirements of the Motor Carrier Act of 1980. This endorsement acts as a guarantor that a carrier has the minimum level of financial responsibility as mandated by federal regulations when they engage in interstate commerce. The Motor Carrier Act requires that vehicle operators involved in transporting goods have adequate insurance coverage to compensate for damages resulting from accidents. Thus, the MCS-90 ensures that regardless of the specifics of the underlying insurance policy, the minimum financial liability levels are maintained. This is crucial for protecting the public and other parties affected by potential accidents involving commercial vehicles.