\newenvironment{DUCLASSheader}
    {   % renew the itemize command in order to apply a flushright to each elements
        \let\olditemize\itemize% 
        \renewcommand\itemize{\olditemize\raggedleft\setlength\itemsep{0.0em}\small}%
        % Create a minipage on the right
        \begin{flushright}\begin{minipage}[t][0cm][b]{\linewidth}%
        \raggedleft\em\color{gray}}
    {   \end{minipage}\end{flushright}}