I've a few jobs that never seem to end. In particular, a K&T era large farmhouse cut up into 12 units, 9 professional offices and 3 resi apt's
I've a file of permits as thick as a phone book on this property alone.
So one of the newer AHJ's who came along recently produced what he calls a 'blanket permit' , which is simply a regular permit with an explanatory attachment inclusive of dates and work details.
It's a great instrument, especially considering i usually can't recall what was for lunch an hour after i ate it