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United States
47 CFR Part 2 — Frequency Allocations and Radio Treaty Matters; General Rules and Regulations

47 CFR Part 2 — Frequency Allocations and Radio Treaty Matters; General Rules and Regulations

law://us/cfr/47/2@2026-11-12

Version in force onWhereUnited States

Defined terms · 6

Show every defined term

affiliate
means an entity that (directly or indirectly) owns or controls, is owned or controlled by, or is under common ownership or control with, another entity;
African Broadcasting Area
means:
fixed location
means that the device is physically secured at one location and is not able to be easily moved to another location while transmitting.
own
means to have, possess, or otherwise control an equity interest (or the equivalent thereof) of 10 percent or more.
subsidiary
means any entity in which another entity directly or indirectly:
used radio frequency device
refers to “any device that was previously sold to a retail customer and is marketed as a 'used' or otherwise not 'new' device.”

us/cfr/47/2

Key facts

Type: CFR part · 47 CFR Part 2
Made by: Chapter I—Federal Communications Commission

Topics

Telecommunication

History · 20 versions

13 Oct 2026Reading
29 Sept 2026
15 Jun 2026
15 May 2026
27 Mar 2026
13 Feb 2026
26 Dec 2025
8 Sept 2025

Show all 20 versions What changed on 13 Oct 2026

This text since 13 Oct 2026

Contents

2.1 Terms and definitions.
2.100 International Radio Regulations.
2.101 Frequency and wavelength bands.
2.102 Assignment of frequencies.
2.103 Federal use of non-Federal frequencies.
2.1031 Cross reference.
2.1033 Application for certification.
2.1035 [Reserved]
2.104 International Table of Frequency Allocations.
2.1041 Measurement procedure.
2.1043 Changes in certificated equipment.
2.1046 Measurements required: RF power output.
2.1047 Measurements required: Modulation characteristics.
2.1049 Measurements required: Occupied bandwidth.
2.105 United States Table of Frequency Allocations.
2.1051 Measurements required: Spurious emissions at antenna terminals.
2.1053 Measurements required: Field strength of spurious radiation.
2.1055 Measurements required: Frequency stability.
2.1057 Frequency spectrum to be investigated.
2.106 Table of Frequency Allocations.
2.1060 Equipment for use in the amateur radio service.
2.107 Radio astronomy station notification.
2.1071 Cross reference.
2.1072 Limitation on Supplier's Declaration of Conformity.
2.1074 Identification.
2.1077 Compliance information.
2.108 Policy regarding the use of the fixed-satellite allocations in the 3.6-3.7, 4.5-4.8, and 5.85-5.925 GHz bands.
2.1091 Radiofrequency radiation exposure evaluation: mobile devices.
2.1093 Radiofrequency radiation exposure evaluation: portable devices.
2.1201 Purpose.
2.1202 Exclusions.
2.1203 General requirement for entry into the U.S.A.
2.1204 Import conditions.
2.1207 Examination of imported equipment.
2.201 Emission, modulation, and transmission characteristics.
2.202 Bandwidths.
2.301 Station identification requirement.
2.302 Call signs.
2.303 Other forms of identification of stations.
2.401 Distress messages.
2.402 Control of distress traffic.
2.403 Retransmission of distress message.
2.404 Resumption of operation after distress.
2.405 Operation during emergency.
2.406 National defense; free service.
2.407 National defense; emergency authorization.
2.701 Prohibition against use of a radio device for eavesdropping.
2.801 Radiofrequency device defined.
2.803 Marketing of radio frequency devices prior to equipment authorization.
2.805 Operation of radio frequency devices prior to equipment authorization.
2.807 Statutory exceptions.
2.811 Transmitters operated under part 73 of this chapter.
2.813 [Reserved]
2.815 External radio frequency power amplifiers.
2.901 Basis and purpose.
2.902 Terms and definitions.
2.903 Prohibition on authorization of equipment on the Covered List and related equipment.
2.906 Supplier's Declaration of Conformity.
2.907 Certification.
2.908 Identical defined.
2.909 Responsible party.
2.910 Incorporation by reference.
2.911 Application requirements.
2.915 Grant of application.
2.917 Dismissal of application.
2.919 Denial of application.
2.921 Hearing on application.
2.923 Petition for reconsideration; application for review.
2.924 Marketing of electrically identical equipment having multiple trade names and models or type numbers under the same FCC Identifier.
2.925 Identification of equipment.
2.926 FCC identifier.
2.927 Limitations on grants.
2.929 Changes in name, address, ownership or control of grantee.
2.931 Responsibilities.
2.932 Modification of equipment.
2.933 Change in identification of equipment.
2.935 Electronic labeling of radiofrequency devices.
2.937 Equipment defect and/or design change.
2.938 Retention of records.
2.939 Revocation, withdrawal, or limitation of equipment authorization.
2.941 Availability of information relating to grants.
2.944 Software defined radios.
2.945 Submission of equipment for testing and equipment records.
2.947 Measurement procedure.
2.948 Measurement facilities.
2.949 Recognition of laboratory accreditation bodies.
2.950 Transition periods.
2.951 Recognition of measurement facilities.
2.960 Recognition of Telecommunication Certification Bodies (TCBs).
2.962 Requirements for Telecommunication Certification Bodies.
2.964 Pre-approval guidance procedure for Telecommunication Certification Bodies.

Contents

2.1 Terms and definitions.
2.100 International Radio Regulations.
2.101 Frequency and wavelength bands.
2.102 Assignment of frequencies.
2.103 Federal use of non-Federal frequencies.
2.1031 Cross reference.
2.1033 Application for certification.
2.1035 [Reserved]
2.104 International Table of Frequency Allocations.
2.1041 Measurement procedure.
2.1043 Changes in certificated equipment.
2.1046 Measurements required: RF power output.
2.1047 Measurements required: Modulation characteristics.
2.1049 Measurements required: Occupied bandwidth.
2.105 United States Table of Frequency Allocations.
2.1051 Measurements required: Spurious emissions at antenna terminals.
2.1053 Measurements required: Field strength of spurious radiation.
2.1055 Measurements required: Frequency stability.
2.1057 Frequency spectrum to be investigated.
2.106 Table of Frequency Allocations.
2.1060 Equipment for use in the amateur radio service.
2.107 Radio astronomy station notification.
2.1071 Cross reference.
2.1072 Limitation on Supplier's Declaration of Conformity.
2.1074 Identification.
2.1077 Compliance information.
2.108 Policy regarding the use of the fixed-satellite allocations in the 3.6-3.7, 4.5-4.8, and 5.85-5.925 GHz bands.
2.1091 Radiofrequency radiation exposure evaluation: mobile devices.
2.1093 Radiofrequency radiation exposure evaluation: portable devices.
2.1201 Purpose.
2.1202 Exclusions.
2.1203 General requirement for entry into the U.S.A.
2.1204 Import conditions.
2.1207 Examination of imported equipment.
2.201 Emission, modulation, and transmission characteristics.
2.202 Bandwidths.
2.301 Station identification requirement.
2.302 Call signs.
2.303 Other forms of identification of stations.
2.401 Distress messages.
2.402 Control of distress traffic.
2.403 Retransmission of distress message.
2.404 Resumption of operation after distress.
2.405 Operation during emergency.
2.406 National defense; free service.
2.407 National defense; emergency authorization.
2.701 Prohibition against use of a radio device for eavesdropping.
2.801 Radiofrequency device defined.
2.803 Marketing of radio frequency devices prior to equipment authorization.
2.805 Operation of radio frequency devices prior to equipment authorization.
2.807 Statutory exceptions.
2.811 Transmitters operated under part 73 of this chapter.
2.813 [Reserved]
2.815 External radio frequency power amplifiers.
2.901 Basis and purpose.
2.902 Terms and definitions.
2.903 Prohibition on authorization of equipment on the Covered List and related equipment.
2.906 Supplier's Declaration of Conformity.
2.907 Certification.
2.908 Identical defined.
2.909 Responsible party.
2.910 Incorporation by reference.
2.911 Application requirements.
2.915 Grant of application.
2.917 Dismissal of application.
2.919 Denial of application.
2.921 Hearing on application.
2.923 Petition for reconsideration; application for review.
2.924 Marketing of electrically identical equipment having multiple trade names and models or type numbers under the same FCC Identifier.
2.925 Identification of equipment.
2.926 FCC identifier.
2.927 Limitations on grants.
2.929 Changes in name, address, ownership or control of grantee.
2.931 Responsibilities.
2.932 Modification of equipment.
2.933 Change in identification of equipment.
2.935 Electronic labeling of radiofrequency devices.
2.937 Equipment defect and/or design change.
2.938 Retention of records.
2.939 Revocation, withdrawal, or limitation of equipment authorization.
2.941 Availability of information relating to grants.
2.944 Software defined radios.
2.945 Submission of equipment for testing and equipment records.
2.947 Measurement procedure.
2.948 Measurement facilities.
2.949 Recognition of laboratory accreditation bodies.
2.950 Transition periods.
2.951 Recognition of measurement facilities.
2.960 Recognition of Telecommunication Certification Bodies (TCBs).
2.962 Requirements for Telecommunication Certification Bodies.
2.964 Pre-approval guidance procedure for Telecommunication Certification Bodies.

In force

Contents

1,910 provisions, too many to show on one page. Open a part or section to read it with its history and connections, or search inside the text.

2.1 · Terms and definitions.
2.100 · International Radio Regulations.
2.101 · Frequency and wavelength bands.
2.102 · Assignment of frequencies.
2.103 · Federal use of non-Federal frequencies.
2.1031 · Cross reference.
2.1033 · Application for certification.
2.1035 · [Reserved]
2.104 · International Table of Frequency Allocations.
2.1041 · Measurement procedure.
2.1043 · Changes in certificated equipment.
2.1046 · Measurements required: RF power output.
2.1047 · Measurements required: Modulation characteristics.
2.1049 · Measurements required: Occupied bandwidth.
2.105 · United States Table of Frequency Allocations.
2.1051 · Measurements required: Spurious emissions at antenna terminals.
2.1053 · Measurements required: Field strength of spurious radiation.
2.1055 · Measurements required: Frequency stability.
2.1057 · Frequency spectrum to be investigated.
2.106 · Table of Frequency Allocations.
2.1060 · Equipment for use in the amateur radio service.
2.107 · Radio astronomy station notification.
2.1071 · Cross reference.
2.1072 · Limitation on Supplier's Declaration of Conformity.
2.1074 · Identification.
2.1077 · Compliance information.
2.108 · Policy regarding the use of the fixed-satellite allocations in the 3.6-3.7, 4.5-4.8, and 5.85-5.925 GHz bands.
2.1091 · Radiofrequency radiation exposure evaluation: mobile devices.
2.1093 · Radiofrequency radiation exposure evaluation: portable devices.
2.1201 · Purpose.
2.1202 · Exclusions.
2.1203 · General requirement for entry into the U.S.A.
2.1204 · Import conditions.
2.1207 · Examination of imported equipment.
2.201 · Emission, modulation, and transmission characteristics.
2.202 · Bandwidths.
2.301 · Station identification requirement.
2.302 · Call signs.
2.303 · Other forms of identification of stations.
2.401 · Distress messages.
2.402 · Control of distress traffic.
2.403 · Retransmission of distress message.
2.404 · Resumption of operation after distress.
2.405 · Operation during emergency.
2.406 · National defense; free service.
2.407 · National defense; emergency authorization.
2.701 · Prohibition against use of a radio device for eavesdropping.
2.801 · Radiofrequency device defined.
2.803 · Marketing of radio frequency devices prior to equipment authorization.
2.805 · Operation of radio frequency devices prior to equipment authorization.
2.807 · Statutory exceptions.
2.811 · Transmitters operated under part 73 of this chapter.
2.813 · [Reserved]
2.815 · External radio frequency power amplifiers.
2.901 · Basis and purpose.
2.902 · Terms and definitions.
2.903 · Prohibition on authorization of equipment on the Covered List and related equipment.
2.906 · Supplier's Declaration of Conformity.
2.907 · Certification.
2.908 · Identical defined.
2.909 · Responsible party.
2.910 · Incorporation by reference.
2.911 · Application requirements.
2.915 · Grant of application.
2.917 · Dismissal of application.
2.919 · Denial of application.
2.921 · Hearing on application.
2.923 · Petition for reconsideration; application for review.
2.924 · Marketing of electrically identical equipment having multiple trade names and models or type numbers under the same FCC Identifier.
2.925 · Identification of equipment.
2.926 · FCC identifier.
2.927 · Limitations on grants.
2.929 · Changes in name, address, ownership or control of grantee.
2.931 · Responsibilities.
2.932 · Modification of equipment.
2.933 · Change in identification of equipment.
2.935 · Electronic labeling of radiofrequency devices.
2.937 · Equipment defect and/or design change.
2.938 · Retention of records.
2.939 · Revocation, withdrawal, or limitation of equipment authorization.
2.941 · Availability of information relating to grants.
2.944 · Software defined radios.
2.945 · Submission of equipment for testing and equipment records.
2.947 · Measurement procedure.
2.948 · Measurement facilities.
2.949 · Recognition of laboratory accreditation bodies.
2.950 · Transition periods.
2.951 · Recognition of measurement facilities.
2.960 · Recognition of Telecommunication Certification Bodies (TCBs).
2.962 · Requirements for Telecommunication Certification Bodies.
2.964 · Pre-approval guidance procedure for Telecommunication Certification Bodies.

United States Government work; public domain under 17 U.S.C. § 105.