(a) These attendance rules shall apply to the employees in the department who are employed in one of the positions listed below and whose principal duties involve the teaching or instruction of patients or inmates, or the direct supervision of such teaching or instruction; and who are employed on the basis of a calendar year similar to the school calendar year of public school teachers in New York State; and who are compensated in accordance with section 136 of the New York State Civil Service Law:

(b) These rules shall not be construed to require or allow extension of leave with pay except for periods during which the employee is normally paid his/her regular salary.

(c) The provisions of these attendance rules (or attendance regulations), insofar as they apply to employees in the negotiating units, established pursuant to article 14 of the Civil Service Law, shall be continued; provided, however, that during periods of time when there is in effect an agreement between the State and an employee organization reached pursuant to the provisions of said article 14, the provisions of such agreement and the provisions of such rules (or regulations) shall both be applicable. In the event the provisions of the agreement are different from the provisions of the attendance rules (or attendance regulations), the provisions of the agreement shall be controlling.