32 CFR 651.53 - Modifications of the scoping process.
(a) If a lengthy period exists between a decision to prepare an EIS and the time of preparation, the proponent will initiate the NOI at a reasonable time in advance of preparation of the DEIS. The NOI will state any tentative conclusions regarding the scope of the EIS made prior to publication of the NOI. Reasonable time for public participation will be allowed before the proponent makes any final decisions or commitments on the EIS.
(b) The proponent of a proposed action may use scoping during preparation of environmental review documents other than an EIS, if desired. In such cases, the proponent may use these procedures or may develop modified procedures, as needed.