The position of the Canada Revenue Agency (Canadian tax department) is that a voluntary disclosure (tax amnesty) must be substantially complete in order to be accepted as valid. However a taxpayer must only make his reasonable best efforts to ensure that his disclosure is substantially complete, rather than meet some arbitrary test as to what constitutes completeness.
"This article provides information of a general nature only. It is only current at the posting date. It is not updated and it may no longer be current. It does not provide legal advice nor can it or should it be relied upon. All tax situations are specific to their facts and will differ from the situations in the articles. If you have specific legal questions you should consult a lawyer."