If a person who has contracted an illness or suffered an injury, who was an insured on the day of initial examination for that injury or illness, and who did not have a disability of a degree of severity that is classified as any of the disability grades provided for in paragraph (2) of the preceding Article (hereinafter simply referred to as the "disability grades") as of the day of disability assessment, has come to have a disability of a degree of severity that is classified as any of the disability grades due to that injury or illness during the period from the day until the day before the day on which the person reaches the age of 65, the person is entitled to claim the payment of the employees' disability pension under paragraph (1) of that Article during that period.
The provisions of the proviso to paragraph (1) of the preceding Article apply mutatis mutandis to a case under the preceding paragraph.
Notwithstanding the provisions of paragraph (1) of the preceding Article, if the claim under paragraph (1) of this Article is made, employees' disability pension under paragraph (1) of the preceding Article is paid to the person who makes the claim.