The efforts in Congress failed , but just before the regulation was to go into Effect, the President issued an Executive Order suspending the effect of the regulation" until such time as the EPA conducts a thorough reassessment of the regulation in light of the costs the regulation would impose on the oil industry . " Environmental groups and automobile manufacturers have sued the EPA seeking an order that the regulation be enforced as written . They argue that the suspension of the regulation is illegal presidential interference with the EPA's rulemaking authority*