# 2026-15598 — Federal rules taking effect: every published US final rule whose effective date is still in the future

For 2026-15598, rule is Upper C-Band (3.98-4.2 GHz); Expanding Flexible Use of the 3.7 to 4.2 GHz Band; agency is Federal Communications Commission; effective date is 2026-09-29; dates, as printed is The rules are effective September 29, 2026, except for instruction 7 (Sec. Sec. 25.138(a) and (b)); instruction 8 (Sec. 25.147); instruction 17 Sec. (27.14(x)(3)); instruction 26 (Sec. 27.1412(b), (c), (e), and (g); instruction 28 (Sec. 27.1413(a)(3), (c)(1), (c)(9), (e) and (f)); instruction 30 (Sec. 27.1414(e)); instruction 31 (Sec. 27.1415); instruction 32 (Sec. 27.1416); instruction 33 (Sec. 27.1417); instruction 35 (Sec. 27.1419); instruction 37 (Sec. 27.1421); instruction 39 (Sec. 27.1422(c)); and instruction 41 Sec. 27.1424 of the Commission's rules, which contain new or modified information collection requirements that require review by the Office of Management and Budget (OMB) under the Paperwork Reduction Act and will not become effective until the effective date for those information collections is announced in a document published in the Federal Register after the Commission receives OMB approval. The Federal Communications Commission will publish a document in the Federal Register announcing the effective date of these rule sections; cfr parts amended is 47 CFR 1, 47 CFR 25, 47 CFR 27, recorded from its source on 2026-08-10.

- **FR document number:** 2026-15598 _(verified: appears in the quote below)_
- **Rule:** Upper C-Band (3.98-4.2 GHz); Expanding Flexible Use of the 3.7 to 4.2 GHz Band _(verified: appears in the quote below)_
- **Agency:** Federal Communications Commission _(verified: appears in the quote below)_
- **Effective date:** 2026-09-29 _(verified: appears in the quote below)_
- **DATES, as printed:** The rules are effective September 29, 2026, except for instruction 7 (Sec. Sec. 25.138(a) and (b)); instruction 8 (Sec. 25.147); instruction 17 Sec. (27.14(x)(3)); instruction 26 (Sec. 27.1412(b), (c), (e), and (g); instruction 28 (Sec. 27.1413(a)(3), (c)(1), (c)(9), (e) and (f)); instruction 30 (Sec. 27.1414(e)); instruction 31 (Sec. 27.1415); instruction 32 (Sec. 27.1416); instruction 33 (Sec. 27.1417); instruction 35 (Sec. 27.1419); instruction 37 (Sec. 27.1421); instruction 39 (Sec. 27.1422(c)); and instruction 41 Sec. 27.1424 of the Commission's rules, which contain new or modified information collection requirements that require review by the Office of Management and Budget (OMB) under the Paperwork Reduction Act and will not become effective until the effective date for those information collections is announced in a document published in the Federal Register after the Commission receives OMB approval. The Federal Communications Commission will publish a document in the Federal Register announcing the effective date of these rule sections. _(verified: appears in the quote below)_
- **CFR parts amended:** 47 CFR 1, 47 CFR 25, 47 CFR 27 _(our reading, not quoted from the source)_
- **Published:** 2026-07-31 _(verified: appears in the quote below)_

## What the source says

> {"document_number":"2026-15598","title":"Upper C-Band (3.98-4.2 GHz); Expanding Flexible Use of the 3.7 to 4.2 GHz Band","agency_names":["Federal Communications Commission"],"effective_on":"2026-09-29","dates":"The rules are effective September 29, 2026, except for instruction 7 (Sec. Sec. 25.138(a) and (b)); instruction 8 (Sec. 25.147); instruction 17 Sec. (27.14(x)(3)); instruction 26 (Sec. 27.1412(b), (c), (e), and (g); instruction 28 (Sec. 27.1413(a)(3), (c)(1), (c)(9), (e) and (f)); instruction 30 (Sec. 27.1414(e)); instruction 31 (Sec. 27.1415); instruction 32 (Sec. 27.1416); instruction 33 (Sec. 27.1417); instruction 35 (Sec. 27.1419); instruction 37 (Sec. 27.1421); instruction 39 (Sec. 27.1422(c)); and instruction 41 Sec. 27.1424 of the Commission's rules, which contain new or modified information collection requirements that require review by the Office of Management and Budget (OMB) under the Paperwork Reduction Act and will not become effective until the effective date for those information collections is announced in a document published in the Federal Register after the Commission receives OMB approval. The Federal Communications Commission will publish a document in the Federal Register announcing the effective date of these rule sections.","cfr_references":[{"chapter":null,"citation_url":null,"part":"1","title":47},{"chapter":null,"citation_url":null,"part":"25","title":47},{"chapter":null,"citation_url":null,"part":"27","title":47}],"publication_date":"2026-07-31","html_url":"https://www.federalregister.gov/documents/2026/07/31/2026-15598/upper-c-band-398-42-ghz-expanding-flexible-use-of-the-37-to-42-ghz-band"}

## Source

- https://www.federalregister.gov/api/v1/documents.json?per_page=1000&order=oldest&conditions%5Btype%5D%5B%5D=RULE&conditions%5Beffective_date%5D%5Bgte%5D=2026-08-11&conditions%5Beffective_date%5D%5Blte%5D=2026-12-31&fields%5B%5D=document_number&fields%5B%5D=title&fields%5B%5D=agency_names&fields%5B%5D=effective_on&fields%5B%5D=dates&fields%5B%5D=cfr_references&fields%5B%5D=publication_date&fields%5B%5D=html_url

Last verified: 2026-08-10. Review by: 2026-08-24.
Part of [Federal rules taking effect: every published US final rule whose effective date is still in the future](https://referencesource.org/federal-rules-taking-effect/).