When current connection is required.

(a) A current connection is required to qualify an individual for the following types of railroad retirement benefits: (1) An employee occupational disability annuity as described in subpart D of this part; (2) A supplemental annuity as described in subpart E of this part; (3) An employee vested dual benefit in certain cases; (4) A survivor annuity as described in subparts G, H, and I of this part; and (5) A lump-sum death payment as described in part 234 of this chapter. (b) A current connection which was established when an employee's annuity began is effective for: (1) Any annuity under this part for which the employee later becomes eligible; and (2) Any survivor annuity under this part or a lump-sum death payment under part 234 of this chapter.