Which California office is responsible for administering IRP registrations?

The California Office responsible for administering International Registration Plan (IRP) registrations is the DMV's IRP Processing Center located in Sacramento. This center specializes in handling registrations for commercial vehicles that operate in multiple states, which is the primary function of the IRP. By centralizing the processing of IRP registrations in Sacramento, the DMV ensures that all necessary regulations, paperwork, and fees are adequately managed, allowing for an efficient registration process that conforms to both state and federal requirements.

Other offices, such as the California Highway Patrol or different DMV divisions in other locations, play various roles in vehicle regulation and enforcement, but they do not oversee IRP registrations specifically. The IRP Processing Center's specialized focus makes it the authoritative body for these registrations within California.