diff --git a/release/CommonUnits.pdf b/release/CommonUnits.pdf
index 4f79d47..cc42cd3 100644
Binary files a/release/CommonUnits.pdf and b/release/CommonUnits.pdf differ
diff --git a/src/2.Guidelines.tex b/src/2.Guidelines.tex
new file mode 100644
index 0000000..1d42e0d
--- /dev/null
+++ b/src/2.Guidelines.tex
@@ -0,0 +1,29 @@
+\chapter{Guidelines}
+This Chapter sets Guidelines that Units inside \cu\ should follow.
+\section{Prefixes}
+Units should use \fhref{metric prefixes}{https://en.wikipedia.org/wiki/Metric_prefix} to indicate a multiple or a fraction of the unit.\\
+These are as follows:\\~\\
+\begin{tabular}{l c r l}
+    \rowalign{c}{Text} & \rowalign{c}{Symbol} & \rowalign{c}{Factor} & \rowalign{c}{Power} \\
+    \(yotta\) & \(Y\) & 1000000000000000000000000 & \(10^{24}\) \\
+    \(zetta\) & \(Z\) & 1000000000000000000000 & \(10^{24}\) \\
+    \(exa\) & \(E\) & 1000000000000000000 & \(10^{18}\) \\
+    \(peta\) & \(P\) & 1000000000000000 & \(10^{15}\) \\
+    \(tera\) & \(T\) & 1000000000000 &  \(10^{12}\) \\
+    \(giga\) & \(G\) & 1000000000 &  \(10^{9}\) \\
+    \(mega\) & \(M\) & 1000000 &  \(10^{6}\) \\
+    \(kilo\) & \(k\) & 1000 & \(10^{3}\) \\
+    \(hecto\) & \(h\) & 100 & \(10^{2}\) \\
+    \(deca\) & \(d\)  & 10 & \(10^{1}\) \\
+    --- & --- & 1 & \(10^{0}\) \\
+    \(deci\) & \(d\) & 0.1 & \(10^{−1}\) \\
+    \(centi\) & \(c\) & 0.01 & \(10^{−2}\) \\
+    \(milli\) & \(m\) & 0.001 & \(10^{−3}\) \\
+    \(micro\) & \(\mu \) & 0.000001 & \(10^{−6}\) \\
+    \(nano\) & \(n\) & 0.000000001 &\(10^{−9}\) \\
+    \(pico\) & \(p\) & 0.000000000001 & \(10^{−12}\) \\
+    \(femto\) & \(f\) & 0.000000000000001 & \(10^{−15}\) \\
+    \(atto\) & \(a\) & 0.000000000000000001 & \(10^{−18}\) \\
+    \(zepto\) & \(z\) & 0.000000000000000000001 &\(10^{−21}\) \\
+    \(yocto\) & \(y\) & 0.000000000000000000000001 & \(10^{−24}\)
+\end{tabular}
diff --git a/src/CommonUnits.tex b/src/CommonUnits.tex
index afde194..569a3b1 100644
--- a/src/CommonUnits.tex
+++ b/src/CommonUnits.tex
@@ -1,5 +1,4 @@
 \documentclass[a4paper]{report}
-
 %% Language and font encodings
 \usepackage[english]{babel}
 \usepackage[utf8x]{inputenc}
@@ -10,6 +9,7 @@
 \usepackage[hidelinks]{hyperref}
 \usepackage{amsmath}
 \usepackage{amssymb}
+\usepackage{bookmark}
 
 %% Put Chapter Number and name on one line
 \titleformat{\chapter}[hang]
@@ -28,6 +28,9 @@
   \href{#2}{#1}\footnote{\url{#2}}
 }
 
+\newcommand*{\rowalign}[2]{\multicolumn{1}{#1}{#2}}
+\setlength{\parskip}{1em}
+
 \begin{document}
 \maketitle
 
@@ -38,4 +41,5 @@
   \include{Contributors}
 \pagenumbering{arabic}
   \include{1.Challenges}
+  \include{2.Guidelines}
 \end{document}