In 1967, the Tulsa Airports Improvement Trust (TAIT) was established as a public trust to operate, construct and maintain airport facilities on behalf of the city of Tulsa. TAIT has no authority to levy taxes and depends on airport revenues to repay any airport-related debts. TAIT is independent of the city, but all board members are appointed by the Mayor of Tulsa and confirmed by the City Council. In October 1978, TAIT leased all city aviation facilities other than police and fire heliports to the city of Tulsa acting through the Tulsa Airport Authority (TAA), which agreed to disburse all airport-related income to TAIT. In July 1989, a lease amendment gave daily airport operation and maintenance responsibility to the TAA.