In 1938, congress passed the creating an agency responsible for establishing standards for drugs, inspecting food and drug manufacturers, performing food-and drug-related research, etc

In 1938 the United States Congress passed the Federal Food, Drug, and Cosmetic Act, generally referred to as FFDCA, FDCA, or FD&C, in order to give someone authority to the United States Food and Drug Administration, often referred to as the FDA. They were able to oversee the safety of any products that were related to food, drugs, or cosmetics.

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An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.