16.—(1) Following the issue of a certificate by the actuary in accordance with regulation 11(5), the–
(a)principal employer in a case falling within regulation 14 or 15; or
(b)employer in any other case,
must consult the trustees or managers of the scheme about an appropriate amendment date.
(2) The principal employer or employer as applicable, must, as soon as reasonably practicable after consultation, notify the trustees or managers of the scheme of the amendment date.
(3) The notification required by paragraph (2) must be in writing.
(4) Amendments may not have effect before 6th April 2016.