(1) On becoming aware that section 42, 43 or 44 applies to a worker who is receiving, or is entitled to receive, compensation in the form of weekly payments under this Part—
(a) the Authority or self-insurer must give written notice to the worker in accordance with section 188 of the reduction in the amount of the worker's weekly payments; and
(b) weekly payments must not be reduced before the notice has been given.
(2) Section 189(3) does not apply to a notice given under subsection (1) of this section.