"Colorado’s SB 26-134, a bill that would have eliminated sales tax as part of the interchange-fee calculation, has been vetoed by Gov. Jared Polis. SB 26-134, similar to the Illinois Interchange Fee Prohibition Act, would have taken effect Jan. 1, 2028, had Polis approved it. The contentious Illinois law, which has been delayed again to a July 1, 2027, implementation, differs in that it also excludes gratuities."