18Overarching obligation—requirement of proper basis

18 Overarching obligation—requirement of proper basis A person to whom the overarching obligations apply must not make any claim or make a response to any claim in a civil proceeding that— (a) is frivolous; or (b) is vexatious; or (c) is an abuse of process; or (d) does not, on the factual and legal material available to the person at the time of making the claim or responding to the claim, as the case requires, have a proper basis.