Institutional personnel under supervision of Board; duties of superintendent; appointment and discharge of personnel.

The superintendents and all other employees engaged in the operation of the institutions enumerated in § 4-106 shall be subject to the supervision of the Board. Each superintendent shall have the management and control of the institution to which he is appointed and shall be subordinate to the Director of Public Welfare. The superintendent and all other employees of each of the institutions enumerated in § 4-106 shall be appointed by the Mayor of the District of Columbia upon nomination by the Board and shall be subject to discharge by the Mayor upon recommendation of the Board.