A declaratory judgment is a judicial determination of the rights of respective parties, as opposed to coercive relief or damages. The purpose of declaratory.On the other hand, at least one court has refused to construe art. 21.42 as a limitation on the cases to which Texas law can apply. Heirs at law and devisees under will are interested persons with standing to contest a will, and may do so in a declaratory judgment action. An insurer may want to file a declaratory judgment action before the policyholder files suit so that the insurer has the first choice of available forums. ""Declaratory judgment actions are subject to a fouryear statute of limitations. Declaratory judgment action, absent appropriate prayers for specific equitable relief, is itself but an action at law. Lumbermens Mut. Cas. Sec. 16.002. ONE-YEAR LIMITATIONS PERIOD.