This subchapter describes the procedures by which the department will adjudicate a contested case arising under Occupations Code, Chapters 2301 or 2302, or Transportation Code, Chapters 502, 503, 621-623, 643, 645, or 1001-1005, consistent with the requirements of Government Code, Chapter 2001. Unless expressly excluded or limited, this subchapter applies to every contested case in which the department has jurisdiction.