OK, clarification time,
No, we do not 'use' the contractors tools, the qualified person does the actual 'work' and we observe/witness.
Yes, calibration documentation is required for the tool(s), and the 'gear' mfg specs are required to be on site.
Yes, we do accept certification for the torque test/verification from a third party testing company that is state licensed.
The majority of the ECs know the drill. The minority soon learn.
This is for 'other than residential single or 2 family dwellings'.