The main purpose of the Federal Freeze Act is to limit the hiring and salary increases of federal employees for a specified period. The objective is to manage federal workforce levels and control government spending during this time. Key provisions of the Act include a freeze on increasing the number of employees in federal agencies for one year after the law is enacted. Agencies cannot hire more employees than they had at the time the law was passed, except in specific cases related to law enforcement, public safety, or national security.