The board of an area career and technology center may dismiss a director prior to the expiration of the individual's contract for any of the following causes:
1. Immoral conduct.
2. Insubordination.
3. Conviction of a felony.
4. Conduct unbecoming the position of a director.
5. Failure to perform contracted duties without justification.
6. Gross inefficiency that the director has failed to correct after written notice.
7. Continuing physical or mental disability that renders the director unfit or unable to perform the director's duties.