Yes Alan, if the Ufer connection is not buried in the concrete it must remain accessible. Typically they put in a ring over a hole in the wall with a 4" cover.
This is an old picture but it shows the typical Florida Ufer.
http://gfretwell.com/electrical/ufer.jpgThey will TapCon a 4" mud ring on the wall and the stucco guy will float it up level to the cover.
