The present invention includes an apparatus for {TAIL ~ an active/inactive door system} wherein an inactive door lock prevents the locking of an active door lock unless {HEAD ~ the inactive door lock} is first engaged in a locking position 
The present invention includes an apparatus for { TAIL ~ an active / inactive door system } wherein an inactive door lock prevents the locking of an active door lock unless { HEAD ~ the inactive door lock } is first engaged in a locking position
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH