The main purpose of this legislation is to improve the operations of the discount window, which is a facility provided by the Federal Reserve that allows financial institutions to borrow money in times of need. The law aims to ensure that the discount window is effective in providing liquidity, especially during financial crises, and to modernize its operations to better serve the needs of the banking system. Key provisions of the law require the Board of Governors of the Federal Reserve to conduct a thorough review of the discount window operations within a specified timeframe.