Rule 1 – Section 2 – Article 1 – Dimensions and Markings
The field shall be a rectangular area with dimensions, lines, zones, goals and pylons as indicated in Appendix D.
g. Only these contrasting decorative markings are allowed: competition logo, and team name and logo. These are permissible within the sidelines and between the goal lines, under these conditions: (See Appendix D):
1. The entirety of all yard lines, goal lines and sidelines must be clearly visible. No portion of any such line may be obscured by decorative markings.
2. No such markings may touch or enclose the hash marks or numbers.
3. A single decorative marking, centered on the midfield line, and a maximum of four smaller flanking decorative markings are allowed.