SECTION	Title	Time
§ 171.309	§ 171.309 General requirements.	Apr. 30, 2021
§ 171.311	§ 171.311 Signal format requirements.	Apr. 30, 2021
§ 171.313	§ 171.313 Azimuth performance requirements.	Apr. 30, 2021
§ 171.315	§ 171.315 Azimuth monitor system requirements.	Apr. 30, 2021
§ 171.317	§ 171.317 Approach elevation performance requirements.	Apr. 30, 2021
§ 171.319	§ 171.319 Approach elevation monitor system requirements.	Apr. 30, 2021
§ 171.321	§ 171.321 DME and marker beacon performance requirements.	Apr. 30, 2021
§ 171.323	§ 171.323 Fabrication and installation requirements.	Apr. 30, 2021
§ 171.325	§ 171.325 Maintenance and operations requirements.	Apr. 30, 2021
§ 171.327	§ 171.327 Operational records.	Apr. 30, 2021
§ 171.1	§ 171.1 Scope.	May 8, 2026
§ 171.3	§ 171.3 Requests for IFR procedure.	May 8, 2026
§ 171.5	§ 171.5 Minimum requirements for approval.	May 8, 2026
§ 171.7	§ 171.7 Performance requirements.	May 8, 2026
§ 171.9	§ 171.9 Installation requirements.	May 8, 2026