Section 3005-B. Leave of absence for personal illness

The  school
  authorities  of  each  school  district  outside  of  a  city  having  a
  population in excess of one million shall allow each teacher employed by
  the  district sick leave without loss of salary for at least ten working
  days in any year on account of personal sickness or physical disability;
  and provided, further, that if any employee does not use the full amount
  of sick leave allowed in any school year, the amount not used  shall  be
  accumulated  from year to year and used, if needed, up to a total of not
  less than one hundred fifty working days.   Any accumulation  of  unused
  sick  leave  heretofore  granted  by  such  school  authorities shall be
  counted toward the accumulated leave herein provided.  Nothing contained
  in this section shall be construed  to  authorize  a  reduction  in  the
  amount  of  accumulated  leave granted to a teacher prior to July first,
  nineteen hundred sixty-five.