45 CFR § 100.11 - What are the Secretary's obligations in interstate situations?
(a) The Secretary is responsible for:
(1) Identifying proposed Federal financial assistance and direct Federal development that have an impact on interstate areas;
(3) Making efforts to identify and notify the affected state, areawide, regional, and local officials and entities in those states that have not adopted a process under the Order or do not select the Department's program or activity;
(4) Responding pursuant to § 100.10 of this part if the Secretary receives a recommendation from a designated areawide agency transmitted by a single point of contact, in cases in which the review, coordination, and communication with the Department have been delegated.