Final answer:
The United States-Cuba Lease Agreement of 1903 grants the U.S. control and jurisdiction over Guantanamo Bay.
Step-by-step explanation:
The legal basis for the territorial sovereignty over Guantanamo Bay is governed by the United States-Cuba Lease Agreement of 1903, which grants the U.S. control and jurisdiction over the area as long as the lease remains in effect.
Learn more about Territorial sovereignty over Guantanamo Bay