-% # the value in pre+'censustract' is the confirmed censustract; if it's set,
-% # and the user hasn't changed it manually, skip this
+% # the value in pre+'censustract' is the confirmed censustract (either from
+% # the previous saved record, or from address standardization (if the backend
+% # supports it), or from an aborted previous submit. only need to reconfirm
+% # if it's empty.