Notwithstanding any provision of law to the contrary, school district trustees who wilfully commit or engage in an act of malfeasance, misfeasance, chronic unexcused absenteeism, conflicts of interest, misconduct in office, or persistent neglect of duty in office, or are deemed medically incompetent or medically incapacitated, are subject to removal by the Governor upon any of the foregoing causes being made to appear to the satisfaction of the Governor. Before removing any such officer, the Governor shall inform him in writing of the specific charges brought against him and give him an opportunity on reasonable notice to be heard. Vacancies occurring in the membership of any board of trustees for any cause shall be filled for the unexpired term in the same manner as provided for full-term appointments.