Do condo association units with liens or foreclosure lose voting rights?

Our condo association is trying to change common grounds bylaws. Over 100 of 152 units votes yes. 15 units voted no. Because of how laws are written we need 3/4 or 114 votes to past, of the 39 proxies not returned 7 are in foreclosure or have property lien attached these non-returned proxies will be counted as 'no votes,' we are told. For over 30 years this has been the rules, we are told. Is this true?