70. The annual allowance payable to the surviving spouse and to the children in the event of a contributor’s death shall be established on the basis of the benefit that the contributor was receiving or, where applicable, was or would have been entitled to obtain upon his death, not taking into account the reduction provided for in section 57.
In the case of the surviving spouse, the immediate annual allowance shall equal half the contributor’s benefit.
In the case of each child, the immediate annual allowance shall equal one-tenth of that contributor’s benefit or, where the contributor died without leaving a surviving spouse or where the surviving spouse is deceased, that immediate annual allowance shall equal one-fifth of that benefit.
Notwithstanding the foregoing, the total allowances paid pursuant to the third paragraph shall not exceed two-fifths of the contributor’s benefit or, where the contributor died without leaving a surviving spouse or where the surviving spouse is deceased, shall not exceed four-fifths of the benefit that the contributor would have received on the date of his spouse’s death.