18. The amount of weekly benefits shall be equal to the following percentage of the average weekly earnings, calculated in accordance with this division, of the person entitled thereto:
(1) 70% for the 18 weeks of maternity benefits, the five weeks of paternity benefits and the first seven weeks of parental benefits, and for the first 12 weeks of adoption benefits;
(2) 55% for the remaining weeks of parental or adoption benefits.
Notwithstanding the first paragraph, a person may, on the conditions prescribed in a regulation of the Conseil de gestion, elect for weekly benefits equal to 75% of the person’s average weekly earnings. The maximum number of weeks of benefits shall be, in that case, 15 for maternity benefits, three for paternity benefits, 25 for parental benefits and 28 for adoption benefits.
An election made by a parent who is the first to receive benefits in respect of a birth or adoption applies to the benefits of the other parent. Except in exceptional circumstances, an election is irrevocable.