This regulation establishes exemptions from the requirement of a tolerance for residues of the active ingredients cytokinins, auxins, gibberellins, ethylene, and pelargonic acid in or on all food commodities, when used as plant regulators and applied to plants, seeds, or cuttings and on all food commodities after harvest. It does not apply to residues of these substances that are intended to be produced and used in living plants (also known as plant-pesticides), which are being addressed in a future rulemaking. This regulation also removes any existing crop-specific tolerances and/or exemptions from the requirement of a tolerance for the subject active ingredients and such tolerances are considered to be reassessed as required by the Food Quality Protection Act of 1996 (FQPA). This regulation eliminates the need to establish maximum permissible levels for residues of the subject active ingredients. EPA has established this regulation on its own initiative to facilitate the addition of new crops, application rates, and uses to the labels of products containing the listed active ingredients when used as plant regulators.