%% defining section styles
\renewcommand{\section}{\@startsection
  {section}% %name
  {1}% %level
  {0 mm}% %indent
  {\baselineskip}% %beforeskip
  {\baselineskip}% %afterskip
  {\normalfont\fontsize{12}{12pt}\bfseries}}% %style


\renewcommand{\subsection}{\@startsection
  {subsection}% %name
  {2}% %level
  {0 mm}% %indent
  {\baselineskip}% %beforeskip
  {\baselineskip}% %afterskip
  {\normalfont\fontsize{11}{12pt}\bfseries}}% %style

