What type of jurisdiction indicates that the federal government holds the land title but not state authority?

The type of jurisdiction that signifies the federal government holds the land title while lacking state authority is proprietary jurisdiction. Under proprietary jurisdiction, the federal government retains ownership of the land and has certain rights and responsibilities pertaining to its management, but it does not have complete authority to govern or exercise police powers over that land. This means that while the federal government owns the property, the state may still exercise some level of governance or jurisdiction, such as enforcing state laws related to the land's use.

Proprietary jurisdiction is commonly seen in instances such as federal military bases, national parks, or other federally owned properties where the local state has limited authority. This arrangement creates a clear distinction in governance, highlighting the federal government's ownership without necessarily exerting full control over the land.