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.
In 1990, Congress again strengthened the motor vehicle program. The 1990 Clean Air Act Amendments established tighter standards for automobiles, trucks, and buses, called for the control of nonroad engines, strengthened EPA's in-use compliance, and established requirements for both conventional and alternative fuels.he 1990 Clean Air Act Amendments established tighter standards for automobiles, trucks, and buses, called for the control of nonroad engines, strengthened EPA's in-use compliance, and established requirements for both conventional and alternative fuels.