1Where an Order is made under section 2(l)(a) of this Act—
(a)the interim period referred to in subsection (3) of section 1 of the [1974 c. 28.] Northern Ireland Act 1974 shall expire on the coming into force of the Order ; but
(b)if the Order is revoked that period shall run again for the period of one year beginning with the date of revocation and may be continued thereafter as provided by subsection (4) of that section.
2Where an Order under paragraph (a) of subsection (1) of section 2 of this Act comes into force at a time when one or more Orders are in force under paragraph (b) of that subsection the Order or Orders under paragraph (b) shall thereupon cease to have effect.