In addition to any regulation specifically required by this subtitle, regulations that the Commissioner adopts to carry out this subtitle may include:

            (1)      definitions of the terms "administrative capacity", "executive capacity", "professional capacity", and "outside salesman";

            (2)      a scale of wages that is suitable for learners and apprentices but is at least 80% of the minimum wage under this subtitle; and

            (3)      a wage for a special case or class of case if the Commissioner finds the wage appropriate to:

                  (i)      avoid undue hardship;

                  (ii)      prevent the curtailment of employment opportunity; and

                  (iii)      safeguard the minimum wage under this subtitle.