Main Line Restaurant Group (MLRG) is a company that owns and operates a national chain of Italian-themed restaurants. Each of its restaurants is equipped with a series of hoods that ventilate smoke from a wood-burning pizza oven to the outside via a roof vent.

Last year, as part of a broader air pollution control law, Congress passed a statute that authorized the appropriate administrative agency to implement rules intended to decrease the amount of pollution caused by debris in the air from commercial use of wood-burning ovens.

1. When Congress passes a law such as the one described above, what is this type of statute called?