The department shall administer the following principal functions:
a. The supervision and operation of State veterans' memorial homes and cemeteries;
b. The supervision and operation of the liaison office and the field offices which serve the federal Veterans' Affairs Medical Centers;
c. The application for federal grants and programs;
d. The administration of federally funded training and rehabilitation programs; and
e. The provision of current information to the general public on State and federal veterans' programs and benefits.
Nothing in this section shall be construed as affecting or derogating from any provision of law giving functions, powers, and duties in these areas to other departments or agencies or as giving additional functions, powers, and duties to the commissioner or the department.