5 Sections 87 to 89 of the 1984 Act (which provide for the supervision by the Authority of investigations into complaints and other matters) shall not have effect in relation to any complaint or other matter unless—
(a) notice thereof was first received by the appropriate authority on or after the commencement date, and
(b) the conduct to be investigated occurred, or is alleged to have occurred, on or after 29th April 1984.