In the absence or disability of the Medical Adviser of the Board of Health, the Mayor may appoint some other physician to act in place of the Medical Adviser during such absence or disability, and, to the end that the Board may at all times be in position to function and perform its duties, there shall be a substitute appointed for any member thereof when absent or unable or disqualified to act. The substitute so appointed shall have the power to do and perform each act as the regular member thereof while serving on the Board.
(1958 Code § 2.35)