A licensee shall submit to the department evidence of satisfactory completion of at least three clock hours of core curriculum continuing education approved by the director. Core curriculum continuing education is a specific course of study, recommended by the real estate commission for approval by the director that provides practical information on contemporary issues relating to the practices of real estate. The commission may recommend multiple core curricula to address residential, commercial, and property management disciplines or may recommend approval of the same core curriculum if appropriate. Core curriculum may be developed in a separate three clock-hour course or may be three clock hours contained within an approved thirty or less clock-hour course. Core curriculum must be completed within twenty-four months of the licensee's renewal date. Core curriculum commenced within thirty-six months but more than twenty-four months prior to the licensee's renewal date, may not count towards the core curriculum requirement, but may apply as regular continuing education credit for renewal.