N.J. Const. art. V, § 4, ¶ 1

All executive and administrative offices, departments, and instrumentalities of the State government, including the offices of Secretary of State and Attorney General, and their respective functions, powers and duties, shall be allocated by law among and within not more than twenty principal departments, in such manner as to group the same according to major purposes so far as practicable. Temporary commissions for special purposes may, however, be established by law and such commissions need not be allocated within a principal department.