Pure Food and Drug Act
The 1906 Act paved the way for the eventual creation of the Food and Drug Administration (FDA) and is generally considered to be that agency's founding date, though the agency existed before the law was passed and was not named FDA until later. "While the Food and Drug act remains a foundational law of the FDA mission, it's not the law that created the FDA. [Initially,] the Bureau of Chemistry (the precursor to the FDA) regulated food safety. In 1927, the Bureau was reorganized into the Food, Drug, and Insecticide Administration and the Bureau of Chemistry and Soils. The FDIA was renamed the FDA in 1930."
Nondelegation doctrine
For example, the Food and Drug Administration (FDA) is an agency in the Executive branch created by Congress with the power to regulate food and drugs in the United States. Congress has given the FDA a broad mandate to ensure the safety of the public and prevent false advertising, but it is up to the agency to assess risks and announce prohibitions on harmful additives, and to determine the process by which actions will be brought based on the same. Similarly, the Internal Revenue Service has been given the responsibility of collecting taxes that are assessed under the Internal Revenue Code. Although Congress has determined the amount of the tax to be assessed, it has delegated to the IRS the authority to determine how such taxes are to be collected. Administrative agencies like these are sometimes referred to as the Fourth Branch of government.