Once all of the building permits are closed you will be dealing with the Fire/Life Safety officer and YMMV about how closely they are looking at installed equipment. I agree with John, having a NRTL sticker on it will pretty much make further inspection go away unless there is a fire. Repairing and modifying a listed box may have some legal ramifications but I have not seen it in real life. The lawyers told us we could not legally change a plug cap on a line cord (listing issues) but we still had a part number and we could order them.
