Commonwealth Consolidated Regulations Commonwealth Consolidated Regulations(1) Unless sooner cancelled, a rating on a flight service licence is valid for 12 months or until the licence is cancelled or ceases to be valid.
(2) Unless sooner cancelled, an endorsement on a flight service licence remains valid:
(a) for the period (no longer than 6 months) specified for an endorsement in the operations manual of the ATS provider that granted it; or
(b) if the licence is cancelled before that time--until the licence is cancelled; or
(c) until the licence holder ceases to be employed by that ATS provider.