institutions of higher learning

If a retirement system covers positions of employees of one or more institutions of higher learning, then, for purposes of such preceding paragraphs there shall, if the State so desires, be deemed to be a separate retirement system for the employees of each such institution of higher learning. For the purposes of this subparagraph, the term “institutions of higher learning” includes junior colleges and teachers colleges. If a retirement system covers positions of employees of a hospital which is an integral part of a political subdivision, then, for purposes of the preceding paragraphs there shall, if the State so desires, be deemed to be a separate retirement system for the employees of such hospital.