An extractive industry work authority remains in force for the period for which the carrying out of an extractive industry is permitted on the land under the relevant planning scheme or a planning permit unless—
(a) the work authority is sooner cancelled; or
(b) in the case of Crown land, the Crown land Minister's consent is revoked, lapses or otherwise ceases to have effect; or
(c) it is varied under section 77M.
S. 77M inserted by No. 6/2009 s. 20.