2006 New York Code - Documentation.

 
    §  27-606 Documentation. All mix proportions and supporting data shall
  be submitted for acceptance to the commissioner or to the  architect  or
  engineer designated for controlled inspection, as required, prior to the
  start  of any work. All required attestations shall become a part of the
  documentation to be filed with the commissioner, and shall be subject to
  verification by strength  tests,  as  hereinafter  described,  by  check
  sampling   of   ingredients,   or  by  such  other  inspections  as  the
  commissioner or the architect  or  engineer  designated  for  controlled
  inspection  may  elect.  Copies  of  all  documentation  filed  with the
  commissioner, all the licensed concrete testing laboratory test data and
  required attestations, together  with  the  tapes  recording  the  batch
  weight  where  automatic  recording equipment is used shall be available
  for inspection for a period of two years after  the  completion  of  the
  project.  Such  records shall be maintained by the architect or engineer
  designated for controlled inspection.