(1) If:
(a) a retention licence holder requests the Designated Authority in writing to vary a licence condition; or
(b) part of the licence area of a retention licence is surrendered under section 158;
the Joint Authority may vary a licence condition.
(2) If a Designated Authority gives:
(a) a direction under section 387; or
(b) an approval, consent or exemption under the regulations;
to a retention licence holder, the Joint Authority may vary a licence condition to the extent necessary to avoid inconsistency between the licence conditions and the direction, approval, consent or exemption.
(3) The Joint Authority may vary a licence condition subject to whatever conditions the Joint Authority thinks appropriate.
(4) If the Joint Authority varies a licence condition, the Designated Authority must give the licence holder a written notice that:
(a) informs the holder of the variation; and
(b) specifies the conditions which have been varied; and
(c) specifies any conditions to which the variation is subject.