Basketball Rule Changes By Emersonrock Jan 1, 1947 Player fouls allowed per game increased from 5 to 6 Jan 1, 1947 Maximum roster size reduced from 12 to 10 players Jan 11, 1947 Zone defense outlawed Jan 1, 1951 Lane widened from 6 to 12 feet Jan 1, 1954 The 24 second shot clock is introduced Jan 1, 1964 Lane widened from 12 to 16 feet Jan 1, 1966 Team foul limit is reduced to 5 per quarter Jan 1, 1972 Teams have 30 seconds to replace a disqualified player Jan 1, 1977 25 dollar fee for hanging on rim in pre-game Jan 1, 1978 Referees increased from 2 to 3 Jan 1, 1979 3 point line established