U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 14Chapter IPart 171Subpart I - Subpart I—Interim Standard Microwave Landing System (ISMLS)
§ 171.251 - Scope.
§ 171.253 - Definitions.
§ 171.255 - Requests for IFR procedures.
§ 171.257 - Minimum requirements for approval.
§ 171.259 - Performance requirements: General.
§ 171.261 - Localizer performance requirements.
§ 171.263 - Localizer automatic monitor system.
§ 171.265 - Glide path performance requirements.
§ 171.267 - Glide path automatic monitor system.
§ 171.269 - Marker beacon performance requirements.
§ 171.271 - Installation requirements.
§ 171.273 - Maintenance and operations requirements.
§ 171.275 - Reports.
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