(a) the service provider has caused a written notice in accordance with subsection (2) to be served on the customer;
(b) a period of not less than 7 days has elapsed since that notice was served; and
(c) the service provider has not been notified under section 16 of an application in relation to the relevant account.
(2) A notice referred to in paragraph (1) (a) shall state that—
(a) the service provider intends to withdraw the essential service after the expiration of 7 days unless the relevant account has been paid; and
(b) if payment of the account would cause substantial financial hardship an oral or written application may be made to the Review Committee for relief under this Act.