"Justiciable" refers to a situation or issue that can be resolved or decided by a court of law. It means that the matter is within the scope of legal authority and can be fairly addressed through a legal process. Full definition
The report was entitled The Legal Problems of Everyday Life — The Nature, Extent and Consequences of Justiciable Problems Experienced by Canadians. (slaw.ca)
Initially, there had to be a substantive cause of action justiciable in England (see The Siskina [1979] AC 210, [1977] 3 All ER 803). (newlawjournal.co.uk)
Thus, the landlords did not present a «justiciable controversy» to the court. (nar.realtor)