\begin{tabbing}
$\forall$\=$i$:Id, ${\it ds}$:$x$:Id fp$\rightarrow$ Type, ${\it da}$:$k$:Knd fp$\rightarrow$ Type, $A$:ecl(${\it ds}$;${\it da}$), ${\it snd}$:msg{-}spec(${\it ds}$;${\it da}$),\+
\\[0ex]${\it upd}$:update{-}spec(${\it ds}$;${\it da}$).
\-\\[0ex]Normal(${\it ds}$)
\\[0ex]$\Rightarrow$ Normal(${\it da}$)
\\[0ex]$\Rightarrow$ ($\forall$$k$$\in$ecl{-}kinds($A$). (isrcv($k$) $\Rightarrow$ $i$ $=$ destination(lnk($k$)) $\in$ Id) \& $k$ $\in$ dom(${\it da}$))
\\[0ex]$\Rightarrow$ update{-}spec{-}decl(${\it upd}$;${\it ds}$)
\\[0ex]$\Rightarrow$ msg{-}spec{-}loc{-}decl(${\it snd}$;$i$;${\it da}$)
\\[0ex]$\Rightarrow$ $\neg$"ecl" $\in$ dom(${\it ds}$)
\\[0ex]$\Rightarrow$ R{-}Feasible(\=ecl{-}machine at $i$ with state ecl\+
\\[0ex]
\\[0ex]$A$
\\[0ex]
\\[0ex]state variables ${\it ds}$
\\[0ex]
\\[0ex]actions ${\it da}$
\\[0ex]
\\[0ex]sends ${\it snd}$
\\[0ex]
\\[0ex]updates ${\it upd}$)
\-
\end{tabbing}