Setting Reply Attributes Based on Time of Day?

Hello, Is there a function within FR to schedule certain attributes to be returned in the Access-Accept reply? Essentially we return a QoS VSA along with VLAN information on a successful auth, however between certain times of day there is more available bandwidth so to be kind to our users we'd like to return a different QoS level to during these bandwidth abundant periods. Does such a mechanism exist? Many thanks, Jezz. Jezz Palmer Information Services and Systems Swansea University Singleton Park Swansea SA2 8PP J.D.F.Palmer@swan.ac.uk