Sec. 137.42 - Fastening of safety belts and
No person may operate an aircraft in
operations required to be conducted under part 137 without a safety belt
and shoulder harness properly secured about that person except that the
shoulder harness need not be fastened if that person would be unable to
perform required duties with the shoulder harness fastened.
[Amdt. 137-10, 44 FR 61325, Oct. 25, 1979]