In article , "KØHB"
writes:

In fact, used to be that you needed to NOTIFY the FCC if you were going
to operate away from your assigned station location, and periodically
renew that notification.

I remember that the rule was that if you were going to operate away from home
for more than 48 hours, you had to send notification to the FCC district
offices where you'd be. So a ham on a long car vacation would send a series of
cards for each move after the initial 48 hours. Even a long weekend at the
shore or mountains required notification.

Some of just got an additional station
callsign if we were going to spend time at another location.

Some hams collected a string of them, for just that reason. PArticularly across
district lines.

73 de Jim, N2EY