This DHFT Application Note defines Decision Integrity Under Load in Legal Practice as a domain-specific application instance within legal systems. The document applies Dimensional Human Field Theory (DHFT) under canonical constraint to identify conditions under which decision structure is preserved or degraded under sustained load, capacity limitation, and boundary strain. Decision Integrity Under Load does not constitute decision-making advice, legal advice, performance coaching, or system definition. This document does not define, modify, or extend canonical DHFT system structure. System Relation This document is part of the Dimensional Human Field Theory (DHFT) Projection Series. Related technical documents include:Dimensional Human Field Theory (DHFT): Architectural Identification of a Closed Explanatory System — DOI: 10.5281/zenodo.19075948DHFT Technical Note: Admissibility Conditions: Valid System Description — DOI: 10.5281/zenodo.19572188 All documents preserve invariant variables, structural relations, and constraint conditions. All admissible system descriptions reduce to Load (L), Capacity (C), and Boundary (B). OSF Repository: https://osf.io/9psmd/