# Prop. Treas. Reg. § 150.203: Circumstances requiring CMS enforcement.

Proposed regulation, not in force. REG-114676-21, 86 FR 51730, published 2021-09-16 <https://www.federalregister.gov/documents/2021/09/16/2021-19797/requirements-related-to-air-ambulance-services-agent-and-broker-disclosures-and-provider-enforcement>.

25. Section 150.203 is amended by revising the introductory text to read as follows:

CMS enforces PHS Act requirements to the extent warranted (as determined by CMS) in any of the following circumstances:

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