Update special elections procedures

Fixes issue #2. Fills in edge-cases in which positions may be vacant and require a mid-semester vote.

constitution.tex

@@ -161,9 +161,10 @@ George Mason University}
   In the event of a further tie, the Advisor will determine the winner.
   
   \subsection{Special Elections}
-  In event of the resignation of an officer, then an election will be 
-  held to fill their position for the remainder of the term following 
-  the procedures above.
+  In event of the resignation of an officer, removal of an officer, or 
+  any other situation in which there is a vacant executive position,
+  an election will be held to fill that position for the remainder of 
+  the term following the procedures above.
   
   %%%%%%%%%%%%%
   %%% SECTION 6: Meetings
@@ -248,4 +249,4 @@ George Mason University}
   $\frac{3}{4}$ vote of the membership, and the Assistant Director for 
   Recognized Student Organizations. This is considered an official vote.
   
-\end{document}
+\end{document}
\ No newline at end of file