23Subject to paragraphs 29 to 31 below, every trade union and every employers' association which at the commencement of this Part of this Schedule is maintaining a members' superannuation scheme shall arrange for the scheme, as it has effect at a date not later than two years from the commencement of this Part of this Schedule, to be examined by an appropriately qualified actuary, and for the actuary to make a report to the trade union or employers' association on the results of his examination of the scheme.