Okla. Stat. tit. 80, § 80-3: Vesting of jurisdiction - Exemption of lands from taxation

The jurisdiction ceded shall not vest until the United States

shall have acquired the title of said lands by purchase,

condemnation or otherwise; and so long as the said lands shall

remain the property of the United States, when acquired as

aforesaid, and no longer, the same shall be and continue exempt and

exonerated from all state, county and municipal taxation,

assessment, or other charges which may be levied or imposed under

the authority of this state.