Noun
a legislative act that applies only to a particular person or particular district
Source: WordNetBy special act of Congress, he was commissioned a 1st Lieutenant in the Marine Corps on 4 March 1914. Source: Internet
However parliamentary delays meant it was 4 March 1756 before a special act of parliament created four battalions of 1,000 men each to include foreigners for service in the Americas. Source: Internet
Texas was added later by a special act passed in 1906. Source: Internet