15. Where, immediately before the commencement date, the trustees or managers of the scheme were required under Article 57(1)(b) of the 1995 Order and regulation 18 of the 1996 Regulations (occasional and periodic certification of adequacy of contributions) to obtain annual certificates as to the adequacy of contributions payable towards the scheme, those provisions, Article 57(5) to (7) of that Order and Schedule 3 to those Regulations shall apply to the scheme until the effective date of the first valuation under the Order relating to the scheme.