The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of New Hampshire. This submission revises previously approved transportation conformity criteria and procedures related to interagency consultation and enforceability of certain transportation-related control measures and mitigation measures. In addition, the revision continues to rely on the Federal rule for General Conformity. The intended effect of this action is to approve State criteria and procedures to govern conformity determinations. This action is being taken in accordance with the Clean Air Act.