What is the test for making a security for costs order?

The Court of Appeal for Ontario’s observations in Yaiguaje v. Chevron Corp., 2017 ONCA 827, at paras. 23-25, make plain that the focus of the analysis under Rule 56 is the justness of the order: The Rules explicitly provide that an order for security for costs should only be made where the justness of the case demands it. Courts must be vigilant to ensure an order that is designed to be protective in nature is not used as a litigation tactic to prevent a case from being heard on its merits, even in circumstances where the other provisions of rr. 56 or 61 have been met. Courts in Ontario have attempted to articulate the factors to be considered in determining the justness of security for costs orders. They have identified such factors as the merits of the claim, delay in bringing the motion, the impact of actionable conduct by the defendants on the available assets of the plaintiffs, access to justice concerns, and the public importance of the litigation… While this case law is of some assistance, each case must be considered on its own facts. It is neither helpful nor just to compose a static list of factors to be used in all cases in determining the justness of a security for costs order. There is no utility in imposing rigid criteria on top of the criteria already provided for in the Rules. The correct approach is for the court to consider the justness of the order holistically, examining all of the circumstances of the case and guided by the overriding interest of justice to determine whether it is just that the order be made.