Merchant Codes Can Save Lives Act

This bill prevents states from banning or discouraging the use of specific merchant category codes that identify firearm-related transactions. It directly affects state governments by restricting their ability to regulate how payment processors classify purchases of firearms, ammunition, and related accessories. The key provision adds a federal rule to the U.S. Code that overrides state laws attempting to prohibit these codes, with enforcement handled by the Attorney General through civil lawsuits. The legislation aims to ensure uniformity in how these transactions are processed across all states without taking a position on gun policy itself.