Representatives serve three years, with staggered terms. Chairman and Vice-Chairman are elected from within the Commission membership, and each serves one year. Most members of the Commission are representatives of the fields of paleontology, biostratigraphy and stratigraphy.
The present-day Commission is comprised of:
Six representatives each from:
Commissioners at Large
- Four representatives each from:
- The Geological Society of America
Three representatives each from:
- American Association of Petroleum Geologists
- Association of American State Geologists
- Geological Association of Canada
- Geological Survey of Canada
- United States Geological Survey
Two representatives each from:
- Canadian Society of Petroleum Geologists
- Society for Sedimentary Geology
One representative each from:
- Asociación Mexicana de Geólogos Petroleros
- Instituto de Geología, Universidad Nacional Autónoma de México Ciudad
- Servicio Geológico Mexicano
- Sociedad Geológica Mexicana
