The U.S. Department of the Treasury has issued a notice of proposed rulemaking (NPRM) to implement the broad-based principles set out in the Guiding and Establishing National Innovation for U.S. Stablecoins (GENIUS) Act for determining when a state-level regulatory regime for “state qualified payment stablecoin issuers” is “substantially similar” to the federal regulatory framework. That determination is the gateway for state-chartered, nonbank stablecoin issuers with up to $10 billion in outstanding stablecoins to operate primarily under state oversight rather than as federally supervised “permitted payment stablecoin issuers.” Comments will be due 60 days after publication in the Federal Register.