New South Wales Consolidated Acts(1988 Act, ss 14, 33)
(1) The appropriate Department Head may appoint to act in a position in the Department that is vacant or the holder of which is suspended, sick or absent:(a) a member of staff the Department, or(b) a member of staff of another Department.
(2) A person, while acting in a position under this section, has all the functions of the holder of the position. However, a person who is not a senior executive officer does not become a senior executive officer for the purposes of Part 3.1 when acting in a senior executive position.
(3) The appropriate Department Head may, at any time, terminate the appointment of a person to act in a position under this section.
(4) This section does not prevent the payment of an allowance to a member of staff of a Department for exercising all or any of the functions of a position if a person is not appointed to act in the position under this section.