«An application to reopen a divorce case is often presented by a showing of fraud, misconduct, or mistaken negotiations, or by show a fundamental inequity or
unfairness in the divorce agreement.
[50] Justices Bastarache and Arbour concluded spousal support
agreements should be given considerable weight, except: (i) where the circumstances under which such an
agreement was negotiated and executed are unsatisfactory; (ii) where there is substantial
unfairness (non-compliance with the objectives of the
Divorce Act) when the
agreement was entered into; or (iii) where at the time an application to determine spousal support is commenced there has been a change
in circumstances not reasonably anticipated by the parties which renders the
agreement unfair (i.e., no longer
in compliance with the objectives of the
Divorce Act).