Which regulation outlines specific checkpoints for inspections?

The correct response refers to the Item's technical order (TO), which is a crucial document in military operations that details the specifications, maintenance requirements, and inspection checkpoints for various items of equipment. Technical orders provide the necessary standards and procedures that personnel must follow to ensure that inspections are conducted thoroughly and efficiently. These checkpoints are essential for maintaining operational readiness and safety by systematically verifying the functionality and condition of equipment.

In contrast, although an Operating Manual may contain useful information on how to operate the equipment, it typically does not detail specific inspection checkpoints. Safety Procedures focus more on practices to ensure safety rather than outlining the specifics of inspections. Meanwhile, an Inspection Standards Guide may provide general guidelines for inspections but lacks the specific technical details and checkpoints that the Item's technical order contains. Thus, the technical order is the primary reference for conducting detailed inspections, making it the most appropriate answer.