If a person is not eligible for old-age, survivors or disability benefits under the legislation of Korea based on periods of coverage credited exclusively under the legislation of Korea, the agency of Korea shall take into account the person’s periods of coverage credited under the
Canada Pension Plan, insofar
as they do not coincide, for the purpose of establishing the person’s entitlement to benefits under the legislation of Korea. The preceding sentence shall not apply for purposes of establishing entitlement to old age, survivors or disability benefits unless the person has completed at least twelve months of coverage under the legislation of Korea.