FlyJSH

Straight from the FARs:


§ 135.243 Pilot in command qualifications.

(a) No certificate holder may use a person, nor may any person serve, as pilot in command in passenger-carrying operations—

(1) Of a turbojet airplane, of an airplane having a passenger-seat configuration, excluding each crewmember seat, of 10 seats or more, or of a multiengine airplane in a commuter operation as defined in part 119 of this chapter, unless that person holds an airline transport pilot certificate with appropriate category and class ratings and, if required, an appropriate type rating for that airplane.





§ 119.3 Definitions.

Commuter operation means any scheduled operation conducted by any person operating one of the following types of aircraft with a frequency of operations of at least five round trips per week on at least one route between two or more points according to the published flight schedules:

(1) Airplanes, other than turbojet powered airplanes, having a maximum passenger-seat configuration of 9 seats or less, excluding each crewmember seat, and a maximum payload capacity of 7,500 pounds or less; or





§ 61.23 Medical certificates: Requirement and duration.

(a) Operations requiring a medical certificate. Except as provided in paragraphs (b) and (c) of this section, a person—

(1) Must hold a first-class medical certificate:

(i) When exercising the privileges of an airline transport pilot certificate; or

(ii) If that person has reached his or her 60th birthday and serves as a pilot in 14 CFR part 121 operations. Notwithstanding the provisions of §61.23(d)(1)(iii), that person's first-class medical certificate expires, for 14 CFR part 121 operations, at the end of the last day of the 6th month after the month of the date of examination shown on the medical certificate.

(2) Must hold at least a second-class medical certificate when exercising the privileges of a commercial pilot certificate; or