This document is to: define the geometrical and non-geometrical acceptance criteria for inspection of layouts assembled whether in the fabrication plant, or trackside in the case of layouts that are delivered as components, part assembled or in kit form; determine the extent of supply; define the minimum requirements for traceability. This document applies only to layouts that are assembled in the manufacturing plant or that are assembled for the first time at trackside. Other aspects such as installation and maintenance also influence performance; these are not considered as part of this standard.