Taken together, it seems clear that Tauro finds that a distinction based on marriage is permissible. But one that is based on sexual orientation is not. This would seem to suggest that because states can determine marriage laws (Commonwealth), it can either allow or refuse same-sex marriage (until otherwise restricted). So those legally married same-sex couples in Massachusetts, Iowa, Connecticut, Vermont, New Hampshire, Washington DC, New York and Maryland and some 18,000 couples in California would be married in the eyes of the federal government while those in civil unions or domestic partnerships would not.