This document plainly states that the Mexican trucks will be subject to an intensified level of safety inspection during the 18 month provisional period. The document also plainly states the insurance requirements so your post above about the Mexican govt not insuring the trucks is ridiculous. Does the US govt insure US trucks.
As I stated in other posts, American trucking companies have bought Mexican trucking companies. Here you will see where Celadon Trucking bought 100% of a Mexican company. Here you will see that MS Carriers bought 50% of a Mexican company. To think that these companies would do anything to expose themselves defies commonsense.
How many Mexicans driving automobiles across the border bother with having insurance even though it's supposedly required of all drivers? Not much happens when they break US laws.