10.—(1) The appellant or the respondent may apply to the relevant police authority for an extension of a relevant period.
(2) Any such application shall set out the period of the required extension and the reasons for the application.
(3) As soon as practicable after receipt of an application under paragraph (1), the relevant police authority shall—
(a)give a copy of the application to the other party (being the appellant or the respondent as the case may be); and
(b)ask that other party whether he consents to the application.
(4) If the other party consents to the application, the relevant period shall be extended in accordance with the application and rule 9 shall have effect as if for that period there were substituted the extended period.
(5) If the other party does not consent to the application, the application shall be referred to the chair who shall determine whether the relevant period should be extended and if so by how long; and where he extends the relevant period, rule 9 shall have effect as if for that period there were substituted the extended period.
(6) In this rule, “relevant period” means, in relation to an application by the appellant, the period referred to in rule 9(6)(a) or (b) and, in relation to an application by the respondent, the period referred to in rule 9(2) or (8).