The word "illegality" refers to something that is against the law or not allowed by the rules. It describes actions, behaviors, or situations that are considered illegal or unlawful. Full definition
The design of such systems varies, and the amount of judicial oversight or evidence of illegality of the behaviour. (slaw.ca)
Within less than four months after the Commission adopted this regulation, the applicants brought an action for annulment of this regulation in which they invoked the inapplicability of the basic regulation on the basis of the plea of illegality in Article 277 TFEU. (europeanlawblog.eu)
Or at least the so - called «illegality defence» will not protect rogue directors, explains Richard Highley (newlawjournal.co.uk)