; 38 U.S.C. 106 note) as having performed active duty service for the purposes described in subsection (c)(1), the Secretary of Defense shall accept the following: (1) In the case of an individual who served on a coastwise merchant vessel seeking such recognition for whom no applicable Coast Guard shipping or discharge form, ship logbook, merchant mariner’s document or Z-card, or other official employment record is available, the Secretary of Defense shall provide such recognition on the basis of applicable Social Security Administration records submitted for or by the individual, together with validated testimony given by the individual or the primary next of kin of the individual that the individual performed such service during the period beginning on December 7, 1941, and ending on December 31, 1946. (2) In the case of an individual who served on a coastwise merchant vessel seeking such recognition for whom the applicable Coast Guard shipping or discharge form, ship logbook, merchant mariner’s document or Z-card, or other official employment record has been destroyed or otherwise become unavailable by reason of any action committed by a person responsible for the control and maintenance of such form, logbook, or record, the Secretary of Defense shall accept other official documentation demonstrating that the individual performed such service during period beginning on December 7, 1941, and ending on December 31, 1946. (3) For the purpose of determining whether to recognize service allegedly performed during the period beginning on December 7, 1941, and ending on December 31, 1946, the Secretary shall recognize masters of seagoing vessels or other officers in command of similarly organized groups as agents of the United States who were authorized to document any individual for purposes of hiring the individual to perform service in the merchant marine or discharging an individual from such service. (b) Treatment of other documentation Other documentation accepted by the Secretary of Defense pursuant to