(1) The functions, responsibilities, duties, and powers imposed on or given to the chief executive of a department by this Act are in addition to those imposed on or given to that chief executive by or under any other Act.
(2) The chief executive of a department shall have the powers necessary to carry out the functions, responsibilities, and duties imposed on that chief executive by or under this Act, as well as the powers necessary to carry out the functions, responsibilities, and duties imposed on that chief executive or that department by or under any other Act.