Might we want to consider a new header line that can express the fact
that something is copyrighted and the terms under which it can be
copied?
For example consider the following in a document header:
Copyright: Sherman Oakes, 1994
Copyright-terms: User may make up to 50 additional copies.
Copyright-cost: $0.10 per additional copy
Copyright-payment-to: Copyright Clearance Center
These lines could be formally structured to make them comprehensible
to the user's viewer.
--karl--