%  Default values for the \chapter markup
\chapterformat{\numberingstyle{1}
  \titleformat{\dumpinsertseject
               \centerline{\twelvept\bd Chapter \chapternumber}
               \centerline{\twelvept\bd\chaptertitle}
               \vs{1\bl}
               \setsubheadanumber{0}
               \setsubheadbnumber{0}
               \setsubheadcnumber{0}
               \setsubheaddnumber{0}
               }% end titleformat
  \incontents{yes}
}% end chapter format