\[\begin{tabular}{|l| l|}
\hline
	\multicolumn{1}{|c|}{\bf Value} &
		\multicolumn{1}{|c|}{\bf Meaning} \\
\hline
	\tt CRITICAL\_NONE&		Not critical\\
	\tt CRITICAL\_SUBMISSION&	Critical for submission\\
	\tt CRITICAL\_TRANSFER&		Critical for Transfer\\
	\tt CRITICAL\_DELIVERY&		Critical for Delivery\\
\hline
\end{tabular}\]
