What organ of government is concerned with making rules?

Governmental rules are made by the various regulatory agencies established to oversee many of the nation's vital interests. They are created by the legislature (although the president can propose them and promote their role in serving the public interest).

As a governmental agencies, they function almost like a micro-government. They can create rules, enforce rules, and adjudicate disputes concerning their rules. Of course, since they must answer to Congress and the president, they must pay attention to what Congress and the president want, rather than just going off on their own course.

Some well-known US agencies are the Food and Drug Administration, the Environmental Protection Agency, the Federal Communications Commission, and the Nuclear Regulatory Commission. All of these agencies oversee their own section of America's business or resources.

Some agencies are controversial, like the Environmental Protection Agency (EPA), because of the effect of their rules on some aspect of American life. When the EPA enacts or enforces a rule, it usually creates conflict with businesses who are saddled with the costs of complying with the rule. They in turn lobby against the agency, saying it is over-reaching and bad for business.