Does a person who seeks to vary a corollary relief judgment under s. 15(4) need to apply to vary?

On appeal, at paragraph 9 in Riding v. Nova Scotia (Attorney General), 2009 NSCA 82, Justice Fichaud said that a person “who seeks merely to interpret, not vary, a support provision” doesn’t need to apply to vary. His Lordship wrote at paragraph 12 that “an application under s. 15(4) normally would be appropriate, in a case such as this, to seek a judicial interpretation, without a variation, of a corollary relief judgment’s support provision that the Director seeks to enforce.”