Surely this is a violation of civil rights law. The law is going to have a disparate impact on minority groups since there is a difference in vaccination rates between different racial groups. The law doesn't seem narrowly scoped to achieve a specific compelling government interest. People from the government seem to be claiming this is being used to incentivise vaccine uptake. If the government made the claim that the vaccine was necessary in an indoor setting in order to reduce the spread then the law might be ok but because they have been caught making these other claims then it could burn them in court.