Nonetheless, he won passage of laws that restricted labor by women and children and increased standards for factory working conditions. A new State Board of Education was set up 'with the power to conduct inspections and enforce standards, regulate districts' borrowing authority, and require special classes for students with handicaps.' Shortly before leaving office, Wilson signed a series of antitrust laws known as the 'Seven Sisters,' as well as another law that removed the power to select juries from local sheriffs. The Revenue Act of 1913 reduced the average import tariff rates from approximately 40 percent to approximately 26 percent and restored a federal income tax for the first time since 1872. The Revenue Act of 1913 imposed a one percent tax on incomes above $3,000, affecting approximately three percent of the population. Congress later passed the Revenue Act of 1916, which reinstated the federal estate tax, established a tax on the production of munitions, raised the top income tax rate to fifteen percent, and raised the corporate income tax from one percent to two percent.