The Governor shall cause the administrative organization of each department to be examined with a view to promoting economy and efficiency. The Governor may reorganize and organize the principal departments and assign and reassign the duties and functions among the divisions and other units, division heads, officers, and employees; except as otherwise expressly provided by statute. When such changes affect existing law they must be submitted in accordance with Article III, Sec. 5 of the Constitution. The head of a principal department shall have legal custody of all books, papers, documents and other records of the department. The head of a principal department shall be responsible for the preparation and presentation of the department budget request which shall include all funds requested and all receipts expected for all elements of the department. (1971, c. 864, s. 1.)