A Conditional Route may have more than one category, and those categories may change at specified times: a) Category One - Permanently Plannable CDR: CDR1 routes are available for flight planning during times published in the relevant national Aeronautical Information Publication (AIP). b) Category Two - Non-Permanently Plannable CDR: CDR2 routes may be available for flight planning. Flights may only be planned on a CDR2 in accordance with conditions published daily in the CRAM, and c) Category Three - Not Plannable CDR: CDR3 routes are not available for flight planning; however, ATC Units may issue tactical clearances on such route segments.
