This is an Administrative Law question:

Due to the cost of gasoline and concerns about global warming, there has been extensive discussion about raising fuel economy standards for cars and light trucks. Suppose the Environment Protection Agency sought to implement a regulation which required that the average miles per gallon for all cars sold in the United States by any particular automobile manufacturer must be 25 mpg. In a memorandum about 1500 words in length, discuss the discretion and decision making structure necessary to propose and enforce such a regulation. Assume 25 mpg is both feasible and has already been achieved by four foreign automakers.