Under the authority section 24(c) of FIFRA, states may register additional uses of a federally registered pesticide to meet "special local needs" as long as there is a demonstrated "special local need" and a tolerance, exemption from a tolerance, or other clearance under the Federal Food Drug and Cosmetic Act. The Michigan Department of Agriculture (MDA) has authority to issue special local needs registrations (also known as SLNs or 24(c) registrations) for the state of Michigan. Once issued by the state, EPA reviews these registrations and can request that the state revoke the registration if it was improperly issued. Applicators must have the 24(c) supplemental label in their possession at the time of application. If you have questions about 24(c) registrations, please contact the MDA pesticide registration program manager at (517) 373-1087.