Section 1254. Use of special equalization ratios

Notwithstanding the
  provisions of any general or special  law,  the  ratios  established  in
  accordance  with  the  provisions  of  this  article  shall  be  used in
  calculating average full valuation of taxable real estate of a  city  in
  computing  and applying the limitation on the amount to be raised by tax
  on real  estate  pursuant  to  section  ten  of  article  eight  of  the
  constitution  and  the  limitation  on  local  indebtedness  pursuant to
  section four of article eight of the constitution for the fiscal year of
  such city  for  which  such  assessments  are  used  in  computing  such
  limitations.