2Where the relevant notice is given in pursuance of section 6(3) of the 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 l1(7)(b) of this Act, then,
if 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 11(7)(6) 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 section 11 of this Act:
Provided that this paragraph shall not have effect where the relevant notice is a notice to which, apart from the provisions of section 19 of this Act, the said section 6(3) would apply.