The registrar must cancel a licensee's licence if—
(a) the licensee asks, in writing, for the cancellation; and
(b) the licensee gives the licence to the registrar or satisfies the registrar that the licence has been lost, stolen or destroyed; and
(c) the registrar is satisfied that—
(i) the licensee cannot exercise his or her functions because of mental or physical incapacity; or
(ii) another licensee is to take over the licensee's functions in relation to construction services that have not been completely provided; or
(iii) it is otherwise appropriate to approve the cancellation.