\documentclass[12pt, a4paper]{article}
\usepackage[italian]{babel}
\usepackage{multicol}
\usepackage{paracol}
\usepackage{setspace}
\usepackage[
margin=2.6cm,
top=3cm,        
headsep=21pt,
headheight=41pt,
]{geometry}
\usepackage{fancyhdr}
\author{@SirFabio}
\setlength{\columnseprule}{0.1mm}

\pagestyle{fancy}
\lhead{\emph{Atti Parlamentari}}
\chead{– \thepage \ –}
\rhead{\emph{Camera dei Deputati}}
\cfoot{}
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  \vspace{-4pt}%
  \makebox[\headwidth]{\hrulefill}%
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  \makebox[\headwidth]{\footnotesize
    {{LEG}} LEGISLATURA -- DISEGNI DI LEGGE E RELAZIONI -- DOCUMENTI}%
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}

\newcommand\entry[1]{\par\vspace{#1}\ignorespaces}


\begin{document}

\begingroup
\centering
\vspace*{0.5cm}%
\parbox[t]{10.25cm}{\vspace{0pt}%
  \MakeUppercase{\Huge Camera Dei Deputati}\par} \parbox[t]{0pt}{\vspace{0pt}%
  \clap{\footnotesize N. {{NLAW}}}
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}

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\entry{2cm}
\textbf{\Large {{TIPO}}}
\entry{0.9cm}
\scriptsize{\scshape{{{INIZ}}}}\quad
\entry{0.5cm}
\normalsize{\bfseries{{{RELATORI}}}}\quad

\entry{0pt} \hspace{\fill}\makebox[9mm]{\hrulefill}\hspace{\fill}

\entry{1cm}
{{TITOLO}}\quad

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\entry{1.5mm}

\scriptsize{\emph{Presentata {{DATA}}}}\quad
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\vspace{\baselineskip}\par
\endgroup

\begin{multicols}{2}
  \textsc{Onorevoli colleghi!} {{INTRO}}
\end{multicols}



{{ARTPAGE}}



\end{document}