documentclass[a4paper]{report}% http://ctan.org/pkg/amsproc
usepackage[utf8]{inputenc}
usepackage[T1]{fontenc}
usepackage[x11names,]{xcolor}
usepackage{fourier}
usepackage{microtype}
SetTracking[no ligatures={f}]{encoding=*}{80}
usepackage{lipsum}

usepackage[explicit]{titlesec}%

titleformat{chapter}[hang]
{bfseriesfontsize{14pt}{14pt}selectfontcolor{IndianRed3}lsstyle}
{thechapter}
{0.5em}
{MakeUppercase{#1}hfill rlap{makebox[dimexprtextwidth + marginparsep][l]{hspace{marginparsep}rlap{rule[-1.25ex]{marginparwidth}{0.5ex}}thechapter}}}%titlerule[1.5pt]
titlespacing*{chapter}{0pt}{2ex}{1ex}
titleformat{section}
{bfserieslarge}
{thesection}
{0.5em}
{#1hfill rlap{makebox[dimexprtextwidth + marginparsep][l]{hspace{marginparsep}rlap{smash{rule[-1.25ex]{marginparwidth}{0.5ex}}}thesection}}}%titlerule[1.5pt]
titlespacing*{section}{0pt}{1ex}{0.5ex}
titleformat{subsection}
{bfseries}
{thesubsection}
{0.5em}
{#1hfill rlap{makebox[dimexprtextwidth + marginparsep][l]{hspace{marginparsep}rlap{smash{rule[-1.25ex]{marginparwidth}{0.5ex}}}thesubsection}}}%titlerule[1.5pt]
titlespacing*{subsection}{0pt}{1ex}{0.5ex}
begin{document}
%  lipsum[11]

chapter{Introduction}

lipsum[1]

section{Motivation}
lipsum[2]

subsection{A First Motivation}

lipsum[3]

end{document}