As used in this subtitle: (1) "Association" means the Joint Underwriting Association established pursuant to the provisions of this subtitle; (2) "Legal professional liability insurance" means insurance as defined in KRS 304.5- 070(1)(j); (3) "Commissioner" means the commissioner of the Department of Insurance; and (4) "Net direct premiums" means gross direct premiums written on the lines of insurance set forth in KRS 304.41-030(1) as computed by the commissioner of insurance, less return premiums for the unused or unabsorbed portions of premium deposits.