The Divisional Court decision in Rooplal v. Fodor holds that the Limitations Act’s discovery provisions determine discoverability, not common law principles. 16 years after the Limitations Act came into force, this is a point that still needs making.
The motion judge had found the plaintiff’s proceeding timely, and the Divisional Court upheld her decision:
 On the issue of discoverability, the parties relied on ostensibly conflicting lines of jurisprudence from the Court of Appeal for Ontario. On the one hand, were the cases decided before the Limitations Act had entered into force, finding that the limitation period begins to run when the material facts on which the claim is based have been discovered or ought to have been discovered by the plaintiff’s exercise of reasonable diligence (July v. Neal (1986), 1986 CanLII 149 (ON CA), 32 D.L.R. (4th) 463; Johnson v. Wunderlich (1986), 1986 CanLII 2618 (ON CA), 34 D.L.R. (4th) 120; Hier v. Allstate Insurance Co. of Canada (1988), 1988 CanLII 4741 (ON CA), 51 D.L.R. (4th) 1; and Chambo v. Musseau (1993), 1993 CanLII 8680 (ON CA), 15 O.R. (3d) 305. The other line of authority involves cases decided after the Limitations Act had entered into force, which, as explained in the Superior Court’s decision in Chahine v. Grybas, 2014 ONSC 4698, provided that the limitation period does not begin until the plaintiff makes an indemnification demand and the responding insurer fails to satisfy the claim (Markel Insurance Company of Canada v. ING Insurance Company of Canada, 2012 ONCA 218, 109 O.R. (3d) 652; and Schmitz v. Lombard General Insurance Company of Canada, 2014 ONCA 88, 118 O.R. (3d) 694, leave to appeal refused,  S.C.C.A. No. 143). The defendants argued that the July line of cases sets out the proper discoverability analysis, while the plaintiff argued that the Markel line of cases sets out the proper analysis. The Motions judge ultimately determined that she was bound by the Markel line of authorities rather than the July line of cases because, while the latter is predicated on the common law principles of discoverability set out by the Supreme Court of Canada in Central Trust Co. v. Rafuse, 1986 CanLII 29 (SCC),  2 S.C.R. 147, the discoverability provisions in the Limitations Act govern the analysis in the present case rather than the common law principles before the Court of Appeal in the July line of cases.