The EU AI Act Is Now an Engineering Evidence Problem: What CIOs Must Prove Starting August 2, 2026

This article analyzes the EU AI Act's August 2, 2026 enforcement boundary, emphasizing that it marks a shift from policy-based governance to evidence-based compliance. CIOs must prepare an engineering evidence architecture, including AI system inventories, role classification, model documentation, transparency controls, versioned runtime records, data lineage, incident evidence, and regulatory response processes. The article clarifies that high-risk AI obligations are phased, with Chapter III requirements for Annex III systems due by December 2027 and Annex I products by August 2028, but stresses that waiting is not an option. It provides a technical and operational perspective for enterprise technology leaders to build demonstrable compliance evidence.