There is a Chief Executive Officer of the board. The Chief Executive Officer shall: Be responsible for the overall administration of the Baltimore City Public School System; Report directly to the board; Be a member of the cabinet of the Mayor; and Designate individuals with primary responsibility for each of the following functions: Management and administration of the Baltimore City Public School System; Assessment and accountability of the academic performance of the students in the Baltimore City Public School System; Provision of services to students with disabilities in accordance with federal and State law; Development and implementation of initiatives for educational reform; and Professional hiring and development. Notwithstanding the provisions of subsection (b)(4) of this section, the Chief Executive Officer and the board shall be held accountable for the delegated functions. The board shall employ the Chief Executive Officer and establish the salary of the Chief Executive Officer at an amount commensurate with the credentials, experience, and prior positions of responsibility of the Chief Executive Officer. The employment contract of the Chief Executive Officer shall provide, at a minimum, that continued employment is contingent on demonstrable improvement in the academic performance of the students in the Baltimore City Public School System and the successful management of the Baltimore City public schools. The initial contract and any renewal may not exceed 4 years.