Section 61.53: Prohibition on operations during medical deficiency.
(b)
Operations that do not require a medical certificate. For operations provided for in §
61.23(b) of this part, a person shall not act as pilot in command, or in any other capacity as a required pilot flight crewmember, while that person knows or has reason to know of any medical condition that would make the person unable to operate the aircraft in a safe manner.
(c)
Operations requiring a medical certificate or a U.S. driver's license. For operations provided for in §
61.23(c), a person must meet the provisions of—
(1) Paragraph (a) of this section if that person holds a valid medical certificate issued under part
67 of this chapter and does not hold a current and valid U.S. driver's license.
(2) Paragraph (b) of this section if that person holds a current and valid U.S. driver's license.