3. From the same date, the construction board shall administer:(a) every sum from the assets of a supplemental pension plan for the benefit of employees previously subject to a decree applicable to the construction industry;
(b) the contributions and assessments of the employers and employees subject to such a decree which are presently under the management of the Board;
(c) the contributions and assessments for the establishment of every supplemental pension plan applicable to the construction industry;
(d) every sum from the assets of other complementary social benefits plans established under decrees applicable to the construction industry, under order No. 12 of the Commission du salaire minimum or any agreement between employers and employees or between the representative associations and the employer’s association of the construction industry.