Rule 2 – Section 31 – Article 5 – Playing Enclosure
The playing enclosure is that area bounded by the stadium, dome, stands, fences or other structures (Exception: Scoreboards are not considered within the playing enclosure). Where there is no stadium, dome or stands, the playing enclosure is any area within sight and/or sound of the field. (Rules 9-2-6-b and 9-2-7)