usepackage{titlesec}

setcounter{secnumdepth}{0}
setcounter{tocdepth}{3}

% CHAPTER FORMAT

titleformat{chapter}[hang]
    {Hugesffamilybfseries}
    {thechapter}
    {10pt}
    {Huge}

% SECTION FORMAT

titleformat{section}
    {sffamilynormalsizebfseries}
    {thesection}
    {1em}
    {}
titlespacing{section}
    {0pt}
    {0parskip}
    {0parskip}
    [0pt]

% SUBSECTION FORMAT

titleformat{subsection}
    {itshapenormalsize}
    {thesubsection}
    {}
    {}
titlespacing{subsection}
    {0pt}
    {0parskip}
    {-1parskip}
    [0pt]