Sec. 125.283 - Second-in-command qualifications.
No certificate holder may use any person, nor may any person serve, as second in command of an airplane unless that person --
(a) Holds at least a commercial pilot certificate with appropriate category and class ratings, and an instrument rating; and
(b) For flight under IFR, meets the recent instrument experience requirements prescribed for a pilot in command in part 61 of this chapter.