6.—(1) The years of service taken into account under paragraph 4(1) and (2), and the total membership taken into account under paragraphs 4(7)(a) and 5(7)(a) must not exceed 40 years.
(2) Without prejudice to Schedule 3, a credited period which is counted as a period of membership under regulation 125(1) does not count in calculating years of service for sub-paragraph (1) or paragraph 4 or 5.