Section 15(2)(a) of the Representation of the People Act 1983 shall have effect as regards the persons mentioned in section 14(1)(a) and (d) of that Act (members of the forces and their spouses or civil partners who have made a service declaration and are registered or entitled to be registered as electors in pursuance of it)2, as if for “the period of 12 months” there were substituted “the period of 3 years”.