SB66 mandates that payment card networks must offer a merchant category code for firearms and payment processors must assign this code to firearms merchants. Additionally, any contract waiving these requirements is void. The Attorney General has sole enforcement authority and violations can lead to civil penalties of up to $10,000 per violation.

The Colorado State Senate passed SB66 on February 21, 2024 by a vote of 22 to 11. We have assigned pluses to the nays because the workaround by credit-card companies to track ammunition and firearms purchases violates several constitutionally protected rights, including the First, Second and Fourth Amendments. This is a significant invasion of privacy, opens the door for illegal searches, and potentially deters people from making firearm purchases.