2006 New York Code - Cleanouts.

 
    §  27-845  Cleanouts.  Openings shall be provided so that all parts of
  the incinerator can be cleaned, including the ash  pit,  the  combustion
  chamber,  the  passes  of separation chambers, and the incinerator flue.
  Cleanouts shall be closed by tight fitting  doors  or  covers,  securely
  latched  or  otherwise held in a closed position. Ash pit and combustion
  chamber closures and frames shall be of cast iron  or  equivalent,  with
  the frames securely attached to the incinerator.