In 2020, the Supreme Court will decide whether the federal government has jurisdiction to price carbon under the GGPA. If upheld, the GGPPA will layer over a complex patchwork of provincial regulation and policy. Even if struck down, the federal government will probably retain some role in GHG regulation. While both federal and provincial governments likely have a say in GHG regulations, questions about the allocation of authority and the form regulations will take have yet to be answered.