5. Subject to article 6 below, an indemnity may be provided in relation to any action of, or failure to act by, the member or officer in question, which—
(a)is authorised by the authority; or
(b)forms part of, or arises from, any powers conferred, or duties placed, upon that member or officer, as a consequence of any function being exercised by that member or officer (whether or not when exercising that function he does so in his capacity as a member or officer of the authority)—
(i)at the request of, or with the approval of the authority, or
(ii)for the purposes of the authority.