GENIUS Act Stablecoin Regulation: Why the OCC’s Final Rule Is Critical

The GENIUS Act is now moving from statute to implementation, with Treasury writing the rules that will determine who can issue and sell payment stablecoins in the United States. The comment deadline on the proposed rule closed on October 19, 2026, which marks a step from drafting into review before the rule is finalized. For stablecoin businesses, this is the point where compliance expectations start to become more concrete.

Payment stablecoins sit at the center of a wider policy fight between making digital dollars usable in regulated finance and setting boundaries around who gets to issue them. Treasury’s rollout matters because it can reshape access for issuers, intermediaries, and platforms that touch stablecoins, including firms active in DeFi. The outcome will show whether the final regime leaves room for open blockchain activity or pushes more of it into narrower, permissioned channels.

The rulemaking is still open on the details that matter most for DeFi and foreign issuers, and the Blockchain Association’s filing shows those points remain contested. Treasury has not yet finalized how it will draw those lines, so the shape of the regime is not settled. What remains to be seen is whether the final text gives enough clarity for firms to build around it without forcing them to guess how their products will be treated.

Coinpedia’s piece places the deadline in October 2026, while the Blockchain Association filing shows industry groups are already trying to shape the final version of the rule. That means the next important step is Treasury’s response to the comments, not just the comment period itself. For the market, the practical question is whether the final framework becomes detailed enough to guide stablecoin issuers and DeFi participants before enforcement begins.