I am a HAM technician licensed. I think you might mean GMRS, General Mobile Radio Service which is a licensed radio service that uses channels around 462 MHz and 467 MHz. I was not aware of any call sign requirement for GMRS. Though I will admit I am not licensed for GMRS so I can't speak with authority on this, and I don't typically monitor those frequencies so never heard a GMRS convo.
In HAM we send out our call sign typically when we start a conversation, and when we end it. All the back and forth between we don't need to repeat the call signs more than every 10 min.
From what they say here
http://forums.radioreference.com/gmrs-frs/252828-gmrs-identity-procedures.html GMRS is pretty much the same but you have 15 min between needing to identify. But you can see there is a lot of confusion and interpretation going on over there about what the rules are. Now I would suggest if your out and you call in identifying yourself then don't talk for 5 or 10 min, you might still want to identify again. Usually best to error on the side of caution. Otherwise, if your talking with your husband, just toss your call sign every 15 min or so. No penalty for being early with it, and I doubt anyone would gripe if your a little late either.
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