1.The purpose of this chapter is to confer on the Autorité des marchés publics (the Authority) oversight functions and powers in respect of public contracts, whether entered into by a public body or a municipal body, and related public subcontracts, to the extent that those contracts and subcontracts arise from infrastructure projects listed in Schedule I or from other infrastructure projects, such as road, waterworks or sewer infrastructure projects, that are necessary to serve the infrastructure projects listed in that schedule. Those functions and powers are in addition to those conferred on the Authority by the Act respecting the Autorité des marchés publics (chapter A-33.2.1) and the Act respecting contracting by public bodies (chapter C-65.1).