Procedural law, adjective law, in some jurisdictions referred to as remedial law, or rules of court comprises the rules by which a court hears and determines what happens in civil, lawsuit, criminal or administrative proceedings. The rules are designed to ensure a fair and consistent application of due process (in the U.S.) or fundamental justice (in other common law countries) to all cases that come before a court. Substantive law, which refers to the actual claim and defense whose validity is tested through the procedures of procedural law, is different from procedural law. In the context of procedural law, procedural rights may also refer not exhaustively to rights to information, access to justice, and rights to public participation, with those rights encompassing, general civil and political rights. In environmental law, these procedural Rights have been reflected within the UNECE Convention on Access to Information, Public Participation in Decision-making and Access to Justice in Environmental Matters known as the Aarhus Convention (1998).
El derecho procesal es el conjunto de normas que regulan el proceso judicial, es decir, que regula los requisitos, el desarrollo y los efectos del proceso. El derecho procesal es una rama del derecho público que incluye al conjunto de actos mediante los que se constituye, desarrolla y determina la relación jurídica que se establece entre el juzgador, las partes y las demás personas intervinientes. Dicha relación jurídica tiene como finalidad dar solución al litigio planteado por las partes, a través de una decisión del juzgador basada en los hechos afirmados y probados, y en el derecho aplicable.