American Football NCAA Rule 1-2-1-e, f, g, i and j
e. Contrasting coloring in the end zones may abut any line.
f. Only these contrasting decorative markings are allowed: conference logo, NCAA logo, college or university name and 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 50-yard line, and a maximum of four smaller flanking decorative markings are allowed.
g. Goal lines may be of one contrasting color from the white lines.
i. White field yard-line numbers not larger than 6 feet in height and 4 feet in width, with the tops of the numbers nine yards from the sidelines, are recommended.
j. White directional arrows next to the field numbers (except the 50) indicating the direction toward the nearest goal line are recommended. The arrow is a triangle with an 18-inch base and two sides that are 36 inches each.