"Steven P. McNicoll" wrote in message
ink.net...
The pilot changed his mind about Class C services. The controller
discarded
the strip. Nothing was carried forward to the next day. The next day's
request had nothing to do with the previous day's.

You still haven't answered the question of *when* you claim the remain-clear
instruction expires (in the sense that it no longer need be explicitly
rescinded in order for subsequent two-way communication to constitute
permission to enter). Is it when the pilot changes his mind? When the
controller discards the strip? After ten minutes? At midnight, when the
next day starts? Or when?

You acknowledge that the remain-clear doesn't carry forward forever. But if
there's no way to say when it stops, then (as others have proposed) a
plausible alternative interpretation is that it stops immediately, in the
sense that *any* subsequent call-sign "handshake" with ATC establishes
permission to enter (unless the remain-clear is then repeated).

--Gary