40 C.F.R. § 790.3
Terms defined in the Act and not explicitly defined herein are used with the meaning given in the Act. For the purpose of this part:
Act means the Toxic Substances Control Act, 15 U.S.C. 2601 et seq.
Additive means a chemical substance that is intentionally added to another chemical substance to improve its stability or impart some other desirable quality.
Central Data Exchange or CDX means EPA's centralized electronic submission receiving system.
Chemical means a chemical substance or mixture.
Chemical Information Submission System or CISS means EPA's electronic, web-based tool for the completion and submission of data, reports, and other information, or its successors.
Consortium means an association of manufacturers and/or processors who have made an agreement to jointly sponsor testing.
EPA means the U.S. Environmental Protection Agency.
Equivalence data means chemical data or biological test data intended to show that two substances or mixtures are equivalent.
Equivalent means that a chemical substance or mixture is able to represent or substitute for another in a test or series of tests, and that the data from one substance can be used to make scientific and regulatory decisions concerning the other substance.
Exemption means an exemption from a testing requirement of a test rule promulgated under section 4 of the Act and part 799 of this chapter.
Impurity means a chemical substance which is uninitentionally present with another chemical substance.
Joint sponsor means a person who sponsors testing pursuant to section 4(b)(3)(A) of the Act.
Joint sponsorship means the sponsorship of testing by two or more persons in accordance with section
4(b)(3)(A) of the Act.
Person means an individual, partnership, corporation, association, scientific or academic establishment, or organizational unit thereof, and any other legal entity.
Principal sponsor means an individual sponsor or the joint sponsor who assumes primary responsibility for the direction of a study and for oral and written communication with EPA.
Protocol means the plan and procedures which are to be followed in conducting a test.
Reimbursement period refers to a period that begins when the data from the last non-duplicative test to be completed under a test rule are submitted to EPA and ends after an amount of time equal to that which had been required to develop data or after five years, whichever is later.
Sponsor means the person or persons who design, direct and finance the testing of a substance or mixture.
Test substance means the form of chemical substance or mixture that is specified for use in testing.
40 C.F.R. §790.3