40 C.F.R. § 172.1
Terms used in this part have the same meaning as in the Act. In addition, as used in this part, the following terms shall apply:
Act means the Federal Insecticide, Fungicide and Rodenticide Act, as amended.
Applicant means any person who applies for an experimental use permit pursuant to section 5 of the Act.
Cooperator means any person who grants permission to a permittee or a permittee's designated participant for the use of an experimental use pesticide at an application site owned or controlled by the cooperator.
Experimental animals means individual animals or groups of animals, regardless of species, intended for use and used solely for research purposes. The term does not include animals intended to be used for any food purposes
Participant means any person acting as a representative of the permittee and responsible for making available for use, or supervising the use or evaluation of, an experimental use pesticide to be applied at a specific application site.
Permittee means any applicant to whom an experimental use permit has been granted.
Value for pesticide purposes means that characteristic of a substance or mixture of substances which produces an efficacious action on a pest.
40 C.F.R. §172.1