Definitions. In this regulation, the following term has the meaning indicated. “Sworn police officer” means a law enforcement officer who: In an official capacity, is authorized by law to make arrests; and Is within the Secretary's salary setting authority. The State shall pay shift differential to an employee, in a position designated by the appointing authority, who works a qualifying shift, except those employees specified in §G of this regulation. A qualifying shift means a full-time or established part-time shift which starts at or after 2 p.m. and at or before 1 a.m. The State shall pay shift differential on a prorated basis to an employee who works any part of a qualifying shift. The State shall pay a separate shift differential to an employee who works overtime from a qualifying shift into another qualifying shift, in addition to any overtime payment or compensatory time to which the employee may be entitled. The State shall pay a separate shift differential, in addition to any overtime payment or compensatory time to which the employee may be entitled, to an employee who works overtime from a nonqualifying shift into a qualifying shift, if the employee works at least 1/2 of the qualifying shift. The State may not pay a shift differential to an employee who is on leave. The rate of shift differential pay shall be the rates listed in this regulation or as increased by the secretary under separate guidelines: For classifications in Salary Grades 5 through 17: 62.5 cents per hour; For registered nurses through Salary Grade 19 in State institutions, except at Clifton T. Perkins Hospital Center: $2.60 per hour for an evening shift and $2 per hour for a night shift; For registered nurses through Salary Grade 20 in the Clifton T. Perkins registered nurse classification series: $2.60 per hour for an evening shift and $2 per hour for a night shift; For sworn police officers and fire marshals: $1 per hour; For airport firefighters at the Department of Transportation: $1 per hour.