61.55
(a) A person may serve as a second-in-command of an aircraft type certificated for more than one required pilot flight crewmember or in operations requiring a second-in-command pilot flight crewmember only if that person meets the following requirements:
(1) Holds at least a private pilot certificate with the appropriate category and class rating;
(2) Holds an instrument rating or privilege that applies to the aircraft being flown if the flight is under IFR;
(3) Holds at least a pilot type rating for the aircraft being flown
unless the flight will be conducted as domestic flight operations within the United States airspace;
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(b)(2) Except as provided in
paragraph (g) of this section, performed and logged pilot time in the type of aircraft or in a flight simulator that represents the type of aircraft for which second-in-command privileges are requested, which includes—
(i) Three takeoffs and three landings to a full stop as the sole manipulator of the flight controls;
(ii) Engine-out procedures and maneuvering with an engine out while executing the duties of pilot in command; and
(iii) Crew resource management training.
61.55(a)(3) SIC doesn't need a type rating if domestic
(this is going to screw a poor rookie who gets suckered into a flight to Canada, Mexico, or the Bahamas)
61.55(b)(2) OEI ops. Many dirtbag ops forget the engine out portion of this.