The provisions of this Act (other than those of sections 22(6) and 23(7)) do not limit or affect—
(a) any obligation of a body corporate, procedural or otherwise, under any enactment other than this Act, or under its rules or constitution; or
(b) any obligation of the governing or managing body of a body corporate, procedural or otherwise, under any enactment other than this Act, or under the rules or constitution of the body corporate; or
(c) any obligation of any person, procedural or otherwise,—
(i) under any enactment other than this Act relating to leases or licences; or
(ii) under any lease or licence.