The sum is determined as follows:S = [(17,520 × V) - 2 (3×T)] hourly rate
S = the sum of the premiums
hourly rate: $0.50 at 1 April 1984
$1.00 at 1 April 1985
T = trips made during the last 12 months by the vehicles specified in the contract for the zone
V = number of vehicles specified in the contract.
This sum will be adjusted at the end of the fiscal year of the CRSSS to the number of trips actually made, and the firm will have to show, on the basis of its payroll and to the satisfaction of the Conseils régionaux, that the availability premium was paid to the ambulance drivers and attendants who have their ambulance attendant card from the Ministère de la Santé et des Services sociaux.