The repair directory lists all of the tests and inspections required by federal law. These tests and inspections are the first six items on the services key. The National Board "R" stamp and the American Society of Mechanical Engineers (ASME) "U" stamp are listed separately in the services key.

Companies listing "R" or "U" stamps provided Modern Bulk Transporter with copies of their accreditation. Repair shops also provided their federal CT registration number.