Section 6.404 - Lead or cooperating agency(a)Lead Agency. Section 3-3 of Executive Order 12114 requires the creation of a lead agency whenever an action involves more than one Federal agency. In implementing section 3-3, EPA shall, to the fullest extent possible, follow the guidance for the selection of a lead agency contained in 40 CFR 1501.5 of the CEQ regulations.(b)Cooperating Agency. Under Section 2-4(d) of the Executive Order, Federal agencies with special expertise are encouraged to provide appropriate resources to the agency preparing environmental documents in order to avoid duplication of resources. In working with a lead agency, EPA shall to the fullest extent possible serve as a cooperating agency in accordance with 40 CFR 1501.6 . When other program commitments preclude the degree of involvement requested by the lead agency, the responsible EPA official shall so inform the lead agency in writing.