CFR›Title 47›Chapter I›Part 27›Subpart N›Subject Group Coordination/Notification Requirements ContainsSections 27.1320–27.1321CorpusDaily eCFRDisplayed edition2026-09-22Last updated2026-09-22 Sections 27.1320 § 27.1320 Notification to white space database administrators. 27.1321 § 27.1321 Requirements for operation of base and fixed stations in the 600 MHz downlink band in close proximity to Radio Astronomy Observatories. Previous Competitive Bidding Provisions Competitive Bidding Provisions