Federal transit law, 49 USC §5323(d) and FTA Charter Service Regulation, 49 CFR Part 604, prohibits recipients of federal financial assistance from providing charter service, with few exceptions. If you are looking to arrange group transportation, you are encouraged to first contact private charter providers.
Questions about federal charter service regulations may be directed to:
Riverside Transit Agency
Attn: Director of Marketing
P.O. Box 59968
Riverside, CA 92517-1968
951.565.5000