(1) If a party files evidence in response to a notice sent under section 79 , the Registrar of Trade Marks must send each other party a written notice that:
(a) invites the other p arty to file evidence in answer ; and
(b) states the period from the date of the notice in which evidence in answer may be filed.
(2) The period stated for the purposes of paragraph ( 1)(b) must be at least 2 months.
(3) The Registrar of Trade Marks must also notify all parties, in writing, of the date by which a request for a hearing under section 82 must be made.