None. This law is not effect for two reasons.
1. Not enough states have approved the law. If the did it would favor RR because three of the States are California, Ilinois, and Maryland.
2. They may face a constituitonal challenged, which is not clearcut, because state compacts require, per the constitution, approval from Congress. However, the Constituiton allows state to assign electors however they want.
The States have the power to allocate their electoral college votes as they wish, but they don't have the power to compel another state in a compact that Congress did not approve.