# Protection of Stratospheric Ozone: Notice 21 for Significant New Alternatives Policy Program
> **Rule** · Notice of Acceptability. · Published 2006-09-28 · Effective 2006-09-28 · 71 FR 56884
## Document
- **Document number:** E6-15833
- **Category:** air-emissions
- **Federal Register citation:** 71 FR 56884
- **CFR reference:** 40 CFR 82
- **Publication date:** 2006-09-28
- **Effective date:** 2006-09-28
- **EPA docket:** EPA-HQ-OAR-2003-0118
## Abstract

This Notice of Acceptability expands the list of acceptable substitutes for ozone-depleting substances (ODS) under the U.S. Environmental Protection Agency's (EPA) Significant New Alternatives Policy (SNAP) program. The substitutes are for use in the following sectors: refrigeration and air conditioning, foam blowing, cleaning solvents, aerosols, and sterilants. The determinations concern new substitutes.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/09/28/E6-15833/protection-of-stratospheric-ozone-notice-21-for-significant-new-alternatives-policy-program)
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