The Notice of Proposed Rulemaking imposes new requirements on banks and money service businesses when handling non-hosted wallets.
The period for comments has been extended for a further 15 days to allow submissions on a proposed $10,000 limit per transactions.
The United States has passed huge reforms to its anti-money laundering regime, bringing digital asset exchanges and others dealing in digital assets further within the reach of regulators.
In its latest regulatory measure, FinCEN is proposing that U.S. citizens report if they have more than $10,000 in digital currencies with foreign exchanges, wallets or financial service providers.
The U.S. Treasury Department is seeking to hire a policy advisor to guide its digital currency oversight duties.
The U.S. Financial Crimes Enforcement Network has posted a proposal for new rules concerning "non-hosted" digital asset wallets.
Larry Dean Harmon is accused of willfully failing to properly register Helix and Coin Ninja and willfully failing to implement an effective anti-money laundering program within either business.