In addition to the powers set forth elsewhere, the Board shall: adopt rules and regulations to carry out the provisions of this title; adopt and enforce a code that sets minimum standards for installing, altering, remodeling, maintaining, and repairing heating, ventilation, air-conditioning, hydronic, and refrigeration systems; administer examinations; issue licenses; keep a list of all licensees; keep a record of its proceedings; and adopt an official seal. The Board shall enter into a cooperative agreement with a county for the county to enforce the code adopted under this section. If a county has adopted a code prior to January 1, 1988 the county code shall apply within that county. The Board exercises its powers, duties, and functions subject to the authority of the Secretary.