Field modifications are addressed in Section 5.1.4 of the 2013 edition of NFPA 80, and Section 5.1.5 of the 2016 edition. For changes made in the field which are above and beyond those allowed as job site preparations, permission may be requested in advance by contacting the manufacturer of the component being modified; the manufacturer will then contact the appropriate listing laboratory with a written or graphic description of the modifications. For example, most electric strikes require a rectangular cutout in the face of the frame. Permission to make this modification in the field may be approved by the listing lab, after permission is requested through the frame manufacturer. Raceways would also require pre-approval if the door manufacturer’s listings do not address raceways drilled in the field.