Any other provision of this part to the contrary notwithstanding, the authority shall not incur any debt of any kind, whether through contract, mortgage, or otherwise, or encumber any real or personal property in any manner unless such action has been approved in advance, in writing, by the Georgia State Financing and Investment Commission as defined by Article VII, Section IV, Paragraph VII of the Constitution and Article 2 of Chapter 17 of Title 50, the "Georgia State Financing and Investment Commission Act."