3—(1) Article 70A, as so formed, is amended as follows.N.I.
(2) In paragraph (1), after “Before each” insert “ second ”.
(3) In paragraph (2)(a), for “annual” substitute “ biennial ”.
(4) In paragraph (2)(c), for “the period of 5 years” substitute “ the maximum period (see paragraph (2A)) ”.
(5) After paragraph (2) insert—
“(2A) The maximum period mentioned in paragraph (2)(c) is—
(a)6 years, or
(b)such longer period, of not more than 8 years, as the Department may direct in the case of a particular plan (or revised plan).”.