13.03. The employer may also contribute for the benefit of his employees to a registered retirement savings plan managed by an insurer duly authorized as such by the Autorité des marchés financiers or to a special pension fund established and managed by the union which is a party to this Decree and referred to in section 14 of the Professional Syndicates Act (chapter S-40).
In such case, if his contribution to that plan or that fund is lower than the income supplement which would otherwise be payable to the employee pursuant to section 13.01, he shall pay the difference to the employee at the time and in the fashion prescribed in that section.