To apply the provisions related to the payment of employees' pension for surviving family to a case in which it is not known for a period of three months whether an insured or former insured who was on board a ship at the time it sank, capsized, was destroyed, or went missing is alive or dead; to a case in which it is not known for a period of three months whether an insured or former insured who was on board a ship and went missing while the ship was sailing is alive or dead; or to a case in which it becomes clear within three months that such a person has died but the time of death is unknown; that person is presumed to have died on the day on which the ship sank, capsized, was destroyed, or went missing or on the day on which a person went missing. The same applies if it is not known for a period of three months whether an insured or former insured who was on board an airplane at the time the airplane crashed, was destroyed, or went missing is alive or dead; if it is not known for a period of three months whether an insured or former insured who was on board an airplane and went missing while the airplane was flying is alive or dead; or if it becomes clear within three months that such a person has died but the time of death is unknown.
船舶が沈没し、転覆し、滅失し、若しくは行方不明となつた際現にその船舶に乗つていた被保険者若しくは被保険者であつた者若しくは船舶に乗つていてその船舶の航行中に行方不明となつた被保険者若しくは被保険者であつた者の生死が三月間わからない場合又はこれらの者の死亡が三月以内に明らかとなり、かつ、その死亡の時期がわからない場合には、遺族厚生年金の支給に関する規定の適用については、その船舶が沈没し、転覆し、滅失し、若しくは行方不明となつた日又はその者が行方不明となつた日に、その者は、死亡したものと推定する。航空機が墜落し、滅失し、若しくは行方不明となつた際現にその航空機に乗つていた被保険者若しくは被保険者であつた者若しくは航空機に乗つていてその航空機の航行中に行方不明となつた被保険者若しくは被保険者であつた者の生死が三月間わからない場合又はこれらの者の死亡が三月以内に明らかとなり、かつ、その死亡の時期がわからない場合にも、同様とする。