Orders that may diminish the commercial value of property subject to a charge, without affecting the legal characteristics of the chargee's rights or the legal environment for their exercise, do not 'directly affect' the chargee's rights or liabilities for the purposes of the necessary party joinder test. A chargee is not a necessary party to proceedings merely because the orders sought may reduce the value of its security. The systematic approach to the direct effect test requires identification of the specific legal right, assessment of its legal characteristics, and inquiry into whether the order affects the existence or legal characteristics of the right, or the legal environment in which it may be exercised.
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