Level- not edge- trigger for special special elections

Right now the language is written in an "edge trigger" manner (i.e. "if
a seat becomes vacant..."). But I believe the intent is in fact a "level
trigger" (e.g. "when some seats are vacant....").

This switches the language to level triggering.
As a consequence, it is also explicit that at the time the SC decides to
hold a special election, more than one seat might be vacant.

Author: Ericson2314

doc/constitution.md

@@ -200,10 +200,14 @@ If it is impossible to find sufficient members to resign, all members with that
 
 #### Special Elections
 
-In the event of a resignation or other loss of a steering committee member (including a [removal for conduct](#removal-for-conduct)), a special election for that seat may be held if the SC deems it necessary, or the SC does not have half of the normal size.
+In the event of resignations or other loss of steering committee members (including [removals for conduct](#removal-for-conduct)), the SC would have less than all 7 seats filled.
+
+When one or more seats are vacant, a special election may be held for those vacant seats.
 Otherwise, the missing seats are assumed to be abstaining from all the SC votes.
 A committee member elected in a special election will serve out the remainder of the term of the person they are replacing, regardless of the length of that remainder.
 
+A special election for vacant seats may be held if the SC deems it necessary, or the SC does not have half of the normal size.
+
 #### Full Reelections
 
 A simple majority within the SC may call a reelection of the entire SC based on perceived loss of confidence.