Final answer:
The second person checking the tag is responsible for ensuring that safety procedures have been followed during maintenance work.
Step-by-step explanation:
The person checking the tag (second person) is primarily responsible for ensuring safety procedures. This involves verifying that all safety protocols and guidelines have been adhered to before, during, and after the maintenance work is performed. It's a critical role that prioritizes the safety of all personnel and the proper operation of equipment. This responsibility may include checking that lockout-tagout procedures have been followed, personal protective equipment was used, and that the work area is safe to re-enter and for equipment to be put back into operation.