California Code, Public Resources Code - PRC § 21080.3

(a) Prior to determining whether a negative declaration or environmental impact report is required for a project, the lead agency shall consult with all responsible agencies and trustee agencies.  Prior to that required consultation, the lead agency may informally contact any of those agencies.

(b) In order to expedite the requirements of subdivision (a), the Office of Planning and Research, upon request of a lead agency, shall assist the lead agency in determining the various responsible agencies and trustee agencies, for a proposed project.  In the case of a project described in subdivision (c) of Section 21065, the request may also be made by the project applicant.