Defines conditions governing initial access to Dimensional Human Field Theory (DHFT). Entry occurs only under recognition of invariant variables (Load, Capacity, Boundary), structural relations, and admissibility conditions. The entry gate blocks interpretation, application, or redefinition prior to structural orientation. Non-admissible entry routes to canonical constraints and enforcement. Entry operates at boundary conditions governing load admission and structural containment. This document is part of the Dimensional Human Field Theory (DHFT) canonical system. DHFT is a constraint-based system defined over invariant variables:Load (L), Capacity (C), and Boundary (B). All valid system descriptions must preserve:- variable invariance - structural relations - admissibility conditions This document defines a specific component within the DHFT system architecture. It does not redefine system variables or introduce additional constructs. Canonical system reference:Dimensional Human Field Theory (DHFT): Architectural Identification of a Closed Explanatory System DOI: 10.5281/zenodo.19075948 Validity and use constraints are defined in:Admissibility Conditions in DHFT DOI: 10.5281/zenodo.19572188