EPA is revising the procedures for developing Enforceable Consent Agreements (ECAs) to generate test data under the Toxic Substances Control Act (TSCA). The main features of the ECA process that EPA is changing include when and how to initiate negotiations and inserting a firm deadline at which negotiations will terminate. EPA is also deleting, modifying, or consolidating several sections of 40 CFR part 790 to place the ECA provisions in one section and the Interagency Testing Committee (ITC) provisions in a separate section, to make it clearer that there is one ECA negotiation procedure applicable to all circumstances when an ECA would be appropriate, and to make conforming changes in other sections that reference the ECA procedures.