(a) The defect report, voluntary recall plan, and the voluntary recall progress report shall be sent to: Manager, Engine Compliance Programs Group 6403-J, Environmental Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460.

(b) The information gathered by the manufacturer to compile the reports must be retained for not less than five years from the date of the manufacture of the engines and must be made available to duly authorized officials of the EPA upon request.