In administrative law, rulemaking is the process that executive and independent agencies use to create, or promulgate, regulations. In general, legislatures first set broad policy mandates by passing statutes, then agencies create more detailed regulations through rulemaking.

By bringing detailed scientific and other types of expertise to bear on policy, the rulemaking process has been the means by which some of the most far-reaching government regulations of the 20th century have been created. For example, science-based regulations are critical to modern programs for environmental protection, food safety, and workplace safety. However, the growth in regulations has fueled criticism that the rulemaking process reduces the transparency and accountability of democratic government.

Legislatures rely on rulemaking to add more detailed scientific, economic, or industry expertise to a policy—fleshing out the broader mandates of authorizing legislation. For example, typically a legislature would pass a law mandating the establishment of safe drinking water standards, and then assign an agency to develop the list of contaminants and safe levels through rulemaking.

The rise of the rulemaking process itself is a matter of political controversy. Many find that obscure and complex rulemaking tends to undercut the democratic ideal of a government that is closely watched by and accountable to its citizens.

Although executive agencies are usually charged with executing, not promulgating a regulatory scheme, the breadth and depth of regulation today renders it difficult, if not impossible, for legislatures to specify the details of modern regulatory schemes. As a result, the specification of these details are mostly delegated to agencies for rulemaking.

Common purposes of rulemaking include:

Rulemaking processes are generally designed to ensure that

The primary administrative law statutes and other laws that govern agency rule making include: