Art is not illustration. It is infrastructure. The ConceptualArtProtocolSystem names the operational framework through which artistic practice becomes a mode of field construction rather than a mode of field decoration. In the Socioplastics corpus, conceptual art is not a subject to be analyzed. It is a method to be deployed. The LAPIEZA Archive (2009–2025) is not an art project about urban theory. It is urban theory operating through artistic protocols: exhibition as argument, installation as hypothesis, documentation as citation. The ConceptualArtProtocolSystem makes this explicit. It identifies the specific operations that allow artistic practice to function as epistemic infrastructure: the framing of research questions through spatial arrangement, the testing of theoretical claims through material intervention, the generation of evidence through aesthetic experience. These are not metaphors. They are protocols. A protocol is a repeatable operation with predictable outcomes. The ConceptualArtProtocolSystem specifies how artistic operations can generate socioplastic knowledge: not by representing concepts, but by enacting them. Node 1502 places this concept in Core III because conceptual art is one of the seven disciplinary fields that Socioplastics integrates. But the system is not merely descriptive. It is prescriptive. It tells practitioners how to use art as a tool for field-building. Without this concept, the LAPIEZA Archive remains a biographical footnote. With it, the archive becomes a methodological demonstration: proof that a field can be built through aesthetic operations as rigorously as through textual ones.