The federal backstop in the Pan-Canadian Framework implements a BC-style carbon tax for any province or territory unable or unwilling to implement a carbon pricing scheme? 1) implements a BC-style carbon tax for any province or territory unable or unwilling to implement a carbon pricing scheme. 2) sets out standards for provincial or territorial carbon pricing schemes. 3) is designed to be revenue neutral for the federal government. 4) implements a transferable emissions permit scheme for any province or territory unable or unwilling to implement a carbon pricing scheme.