(1) A person appointed deputy principal in a school, in addition to carrying out the professional duties of a school teacher, including those duties particularly assigned to him or her by the principal, shall—
(a) assist the principal in managing the school or such part of it as may be determined by the principal;
(b) undertake any professional duty of the principal which may be delegated to him or her by the principal; and
(c) undertake, in the absence of the principal to the extent required by him, her or other authority, the professional duties of the principal.
(2) A deputy principal who fails to perform any or a combination of the professional duties specified in section 139(1) and subsection (1) is liable to disciplinary action by the Teaching Service Commission in accordance with the regulations made for that purpose by the Commission.