The new citizenship revocation provisions are in force as of today – May 29th, 2015.
Under the new citizenship act, received Royal Assent on June 19, 2014, provides new grounds to revoke Canadian citizenship from dual citizens who are convicted of terrorism, high treason, and/or treason or spying offences, depending on the sentence received. In addition. Upon revocation via the new grounds, there is a permanent bar from re-acquiring citizenship.
http://news.gc.ca/web/article-en.do?nid=981759&tp=930&_ga=1.117816905.159853840.1426788057