(1) If the Commission receives a designated complaint from a designated complainant, the Commission must, within 90 days, assess the complaint and give the complainant one of the following:
(a) a notice under subsection 154ZH(1) (no further action on complaint);
(b) a notice under subsection 154ZK(1) (further action to deal with complaint).
(2) If, before the Commission gives a notice mentioned in subsection (1) to the complainant, it ceases to be a designated complainant, for the purposes of subsection (1), the complaint is taken never to have been made.