TKSMC Relief From Interior Walls.
If your ball comes to rest on or near an interior wall, and you are unable to take a full swing without hitting the wall with your club, you are allowed to take relief of one club length, no closer to the hole.
Exterior walls are marked by out of bounds markers on holes 1, 4, 5, 10, 14, and 18.
All other walls will be considered interior allowing you to take relief.