(a) The emergency action plan must be continually updated to reflect any changes in the names or titles of project operators and attendants and other personnel with specified responsibilities for actions in an emergency and any changes in names of persons to call, telephone numbers, radio call signals, or other information critical to providing notification to affected persons, Federal, state, and local agencies, and medical units.

(b) An applicant or licensee has continuing responsibility to review the adequacy of the emergency action plan in light of any significant changes in upstream or downstream circumstances which might affect water flows or the location or extent of the areas, persons, or property that might be harmed in a project emergency.

(c) Promptly after an applicant or licensee learns of any change in circumstances described in paragraph (b) of this section, the applicant or licensee must:

(1) Inform the Regional Engineer of that change in circumstances;

(2) Consult and cooperate with appropriate Federal, state, and local agencies responsible for public health and safety to determine any advisable revisions to the emergency action plan; and

(3) File with the Regional Engineer any revisions to the appropriate studies, maps, plans, procedures, or other information in the emergency action plan itself or its appendices that have changed as a result of that consultation.

(d) An applicant or licensee must conduct a comprehensive review of the adequacy of the emergency action plan at least once each year.