It shall not be necessary for any person to secure authorization to hold the position of officer or director of two or more carriers if such carriers are operated under common control or management either:
(c)
Pursuant to a controlling, controlled, or common control relationship which has existed between such carriers since before June 16, 1933.
[62 FR 2042, Jan. 15, 1997, as amended at 69 FR 58366, Sept. 30, 2004]