Pesticide Harmonization and Joint Labeling Act - Amends the Federal Insecticide, Fungicide, and Rodenticide Act to establish procedures for the joint labeling of registered pesticides by the United States and any country which has a harmonized pesticide registration regulatory process (harmonized country). Requires the Administrator of the Environmental Protection Agency (EPA), in consultation with a harmonized country, to review and approve joint labels.
Authorizes the Administrator to: (1) require joint labeling of new pesticides or uses; and (2) enter into a memorandum of understanding with any harmonized country to address joint registration and labeling procedures.