173. Ville de Lévis, the municipality of Saint-Lambert-de-Lauzon and the Société de transport de Lévis shall, in the 12 months preceding the end of the transport contract referred to in section 172, enter into an agreement concerning the fares and rates, level of service and financial contribution of the municipality of Saint-Lambert-de-Lauzon with respect to the services referred to in that section, to enable the Société to serve that municipality once the contract has ended.