Sure.
The section in the original CEPA, section 330(3.1), said that you could make regulations that were geographically targeted for regulations authorized under certain sections of the act. The policy objective was to make sure you could make geographically targeted regulations for regulations made under any part of the act.
It's true that it could have been explicitly provided in CEPA. However, in the Interpretation Act in section 8, it says that federal statutes and regulations apply “to the whole of Canada” by default, but may be expressly tailored to apply in specific regions. We're basically relying on the Interpretation Act, which says that you can make geographically targeted regs so that we can do geographically targeted regs under any parts of CEPA.