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- SG 1 – Spectrum management
- SG 3 – Radiowave propagation
- WP 3J – Fundamentals of radio-wave propagation in non-ionized media
- WP 3K – Radio-wave propagation prediction for point-to-area propagation paths
- WP 3L – Ionospheric and ground-wave propagation prediction and radio noise
- WP 3M – Radio-wave propagation prediction for point-to-point paths and paths between the Earth and space
- SG 4 – Satellite services
- SG 5 – Terrestrial services
- WP 5A – Land mobile service above 30 MHz* (excluding IMT); wireless access in the fixed service; amateur and amateur-satellite services
- WP 5B – Maritime mobile service including Global Maritime Distress and Safety System (GMDSS); aeronautical mobile service and radiodetermination service
- WP 5C – Fixed wireless systems; HF and other systems below 30 MHz in the fixed and land mobile services
- WP 5D – IMT Systems
- SG 6 – Broadcasting service
- SG 7 – Science services
- WP 7A – Time signals and frequency standard emissions: Systems and applications (terrestrial and satellite) for dissemination of standard time and frequency signals
- WP 7B – Space radiocommunication applications: Systems for transmission/reception of telecommand, tracking and telemetry data for space operation, space research, Earth exploration-satellite, and meteorological satellite services
- WP 7C – Remote sensing systems: active and passive remote sensing applications in the Earth exploration-satellite service and systems of the MetAids service, as well as space research sensors, including planetary sensors
- WP 7D – Radio astronomy: radio astronomy and radar astronomy sensors, both Earth-based and space-based, including space very long baseline interferometry (VLBI)
- Coordination Committee for Vocabulary (CCV)
- Conference Preparatory Meeting (CPM)
- Chairmen and Vice-Chairmen Meeting (CVC)