Any division, office, commission, council or board attached under this section to a department or independent agency or a specified division thereof shall be a distinct unit of that department, independent agency or specified division. Any division, office, commission, council or board so attached shall exercise its powers, duties and functions prescribed by law, including rule making, licensing and regulation, and operational planning within the area of program responsibility of the division, office, commission, council or board, independently of the head of the department or independent agency, but budgeting, program coordination and related management functions shall be performed under the direction and supervision of the head of the department or independent agency, except that with respect to the office of the commissioner of railroads, all personnel and biennial budget requests by the office of the commissioner of railroads shall be provided to the department of transportation as required under s. 189.02 (7) and shall be processed and properly forwarded by the public service commission without change except as requested and concurred in by the office of the commissioner of railroads.