PAP Architecture - Cohort requirements - TTL

Bill, as discussed I updated the requirements on the Wiki to add your TTL requirement as a more general "validity" requirement, expressed as Validity: a policy cohort may be only valid between a start date/time and an end date/time (either boundaries can be omitted)

Would it work?
Thanks, Jean-Paul https://wiki.oasis-open.org/xacml/Policy%20Administration%20Point%20Architecture