42. The amount of the reimbursement of the insurance contribution paid for a licence bearing one or more of classes 1 to 5 and one or more motorcycle classes is the sum of the following insurance contributions:(1) the product obtained by multiplying the monthly insurance contribution by the number of months, excluding parts of months, between the date of the event giving entitlement to the reimbursement and the expiry date of the period during which the holder is authorized to drive; the monthly insurance contribution is the quotient obtained by dividing by 12 the annual insurance contribution provided for in section 13 based on the insurance contribution payment due year, licence classes 1 to 5 and the total number of demerit points used in calculating the insurance contribution paid;
(2) the sum of insurance contributions for the months, excluding parts of months, between the date of the event giving entitlement to the reimbursement and the expiry date of the period during which the holder is authorized to drive; the insurance contribution for a month is calculated by applying the percentage determined in the second paragraph of section 15 to an amount equivalent to the annual insurance contribution provided for in paragraph 1 of section 13 for motorcycle classes, according to the insurance contribution payment due year and the total number of demerit points used in calculating the insurance contribution paid and related to the motorcycle classes.