1 Pitchers must throw a pitch within 20 seconds of receiving the ball. 2  Clocks posted in each dugout will count down the 20 seconds. 3  There will be a maximum break between innings of 2:05, with a clock keeping track. 4  Hitters must be in the batter's box by 1:45. 5  If the hitter's not ready, the umpire can call a strike. If the pitcher doesn't throw a pitch by 2:05, the umpire can call a ball. 2  Teams will have a maximum of 2:30 to change pitchers, with the clock starting as soon as the reliever enters the playing field. 3  Teams are limited to a maximum of three mound visits per game, not including pitching changes.
The Clean Air Act, originally passed in 1973 and amended in 1990, is a United States federal law designed to protect human health and the environment from the effects of air pollution.
The Federal Clean Air Act. This page last reviewed May 5, 2015. Background: The Federal Clean Air Act (FCAA) is the federal law passed in 1970, and last amended in 1990, which forms the basis for the national air pollution control effort.he Federal Clean Air Act. This page last reviewed May 5, 2015. Background: The Federal Clean Air Act (FCAA) is the federal law passed in 1970, and last amended in 1990, which forms the basis for the national air pollution control effort.