The main purpose of this legislation is to reinstate advance refunding bonds, which are a financial tool used by state and local governments to refinance existing debt at lower interest rates. The goal is to provide these governments with better liquidity and financial flexibility, particularly for funding infrastructure projects. Key provisions of the legislation include the repeal of previous amendments that had restricted the use of advance refunding bonds. By restoring the previous rules, state and local governments will once again be able to issue these bonds to refinance their debts.