The other "silent monument" to the Federal League is a famous legal decision. In 1922, the Supreme Court ruled in "Federal Baseball Club v. National League" (brought by the Terrapins, one of the teams which had not been bought out), that Major League Baseball and its constituent leagues were primarily entertainment, not conventional interstate commerce, and thus were exempt from the Sherman Antitrust Act. Though significantly weakened in the 1970s, this exemption remains intact years later; however it has been eroded by subsequent court rulings and legislation regarding issues specific to Major League Baseball.