\documentclass{mgggarticle}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{hyperref}
\title{Title}
\author{Metric Geometry and Gerrymandering Group}
\date{May 2019}
\version{1.0}
\begin{document}
\begin{titlepage}
\maketitle
\begin{abstract}
Abstract.
\end{abstract}
\newpage
\tableofcontents
\begin{contributors}
A, B, and C contributed to this report.
\end{contributors}
\end{titlepage}
\section{Section}
\subsection{Subsection}
Text.
\newpage
\decoratedsection{A Special Section}
\subsection{Subsection}
Text.
\end{document}