1Where the relevant notice (not being a notice given in pursuance of section 6(3) of the [1958 c. 71.] Agriculture Act 1958) is served on the tenant after the initial date but not later than the commencement date and does not contain such a statement as is mentioned in section 25(2)(c) of the principal Scottish Act or section 11(1)(a) or (b) of this Act, then—
(a)if an application for consent in respect of the relevant notice is made in pursuance of section 25(1) of the principal Scottish Act not later than the commencement date, any such statement as is mentioned in the said section 11(1)(a) which is included in the application shall be treated for the purposes of section 11 of this Act as included also in the relevant notice; and
(b)if, in a case not falling within sub-paragraph (a) above, the landlord serves on the tenant, before or after the commencement date but before the expiration of the period of three months beginning with that date, a notice containing such a statement as is mentioned in the said section l1(1)(a) or (b) and indicating that the relevant notice is to be treated as having always included that statement, the relevant notice shall be so treated for the purposes of the said section 11.