I remember having an argument with a airport "grounds person" who was adamant that I could not park a Citation I in the "below 12500 lb bay" outside FF.
Another occasion we flew a certain "gentleman," who later resided in Spain, into SY. As he was running late for an international flight, we requested and received approval to park and off load at the International Terminal.
After off loading said "gentleman" we were having lunch before departing for warmer climes when we were visited by a very officious Customs person who demanded our GenDec and associated paperwork.
She could not figure out how an aircraft from BN could be parked at the International Terminal to off load paxs.
Tower persons were very flexible in those days.