Differentials Paid for Weekend Shifts. In addition to shift differentials and any other differential paid, the State shall pay a differential of $2 per hour to registered nurses through Salary Grade 19 who work weekend shifts in State institutions, except Clifton T. Perkins Hospital Center. In addition to shift differentials and any other differential paid, the State shall pay a differential of $2 per hour to nurses through Salary Grade 20 in the Clifton T. Perkins registered nurse classification series who work weekend shifts. The State shall pay a registered nurse who works in a State institution time and one-half the regular rate for any shift worked on any of the following holidays as provided in COMAR 17.04.11.08: New Year's Day; Memorial Day; Independence Day; Labor Day; Thanksgiving Day and the day after Thanksgiving; Christmas Day. The State shall pay community health nurses through Salary Grade 18 assigned to the Home Health Program of the Maryland Department of Health who are required to be available for consultations on an on-call basis a differential of $1.50 per hour during the period of time on call. This differential may not be paid for the period of time the community health nurse is on duty. In addition to shift differentials, the State shall pay a differential of $1 per hour to licensed practical nurses and certified nursing assistants who work weekend shifts in State institutions. The Secretary may establish other pay differentials to facilitate the recruitment and retention of employees.