Section 3027. Discrimination based on age prohibited

Notwithstanding any
  provision of law to the contrary, no board of  education  in  any  city,
  union  free,  common  or  central  school  district  in this state shall
  hereafter prohibit, prevent,  disqualify  or  discriminate  against  any
  person   who  is  physically  and  mentally  qualified  from  competing,
  participating, or registering for an examination for or from  qualifying
  for,  a position as teacher, or be penalized in a final rating by reason
  of his or her age.  Any such rule, requirement,  resolution,  regulation
  or penalization of such board shall be void.
    Nothing  herein  contained,  however,  shall  prevent  such board from
  adopting reasonable minimum or maximum age  requirements  for  positions
  which require extraordinary physical effort, except where age limits for
  such positions are already prescribed by law.