41. A unit benefit plan or a flat benefit plan of which the method of calculating contributions determines beforehand the global amount of the latter respecting current service shall not be registered, nor its registration maintained, except upon the following conditions:(a) the return contemplated in section 11 or in subparagraph a to h of the first paragraph of section 15 is prepared by an actuary;
(b) the total assets of the plan, including the actual value of the special contributions respecting an initial unfunded liability, if any, are at least equal to the aggregate of the pension credits on the date of the return contemplated in section 11 or in subparagraphs a to h of the first paragraph of section 15;
(c) any liability determined on the date of the return contemplated in subparagraphs a to h of the first paragraph of section 15 and arising from the difference between the aggregate of the pension credits and the total assets of the plan, including the actual value of the special contributions respecting an initial unfunded liability, if any, is funded before the date of the next return contemplated in subparagraphs a to h of the first paragraph of section 15;
(d) the amounts of benefits under the provisions of the plan in force during any period of time elapsed before the date on any return contemplated in subparagraphs a to h of the first paragraph of section 15 are not reduced.