Apparently, not ALL states are signatories of the Compact!
From Wikipedia:
"Georgia, Wisconsin, Massachusetts, Michigan, and Tennessee are not members.[2] American Association of Motor Vehicle Administrators:[3] Nevada repealed the authorizing legislation in 2007,[4] although it still generally conforms to the agreement through regulations.[2]
Actually, this applies to the reporting of violations, but it is reasonable to think that it also applies to licensing reciprocity. While a state may not be a signatory of the Reciprocity Agreements, it is doubtful that any such state would refuse to recognize a license from another state.
