When the control point is marked on the map as well as on the ground, the description of that point is prefaced by the definite article the; for example, the pond. When the control point is marked on the ground but is not shown on the map, then the description of the point is prefaced by the indefinite article a; for example, a trail junction. In this case, care must be taken to ensure that no similar control exists within at least 25 meters. If it does, then either the control must not be used or it must be specified by a directional note in parentheses; for example, a depression (northern). Other guidelines include:
a. Points of the compass are denoted by capital letters; for example, S, E, SE.
b. Control points within 100 meters of each other or different courses are not to be on the same features or on features of the same description or similar character.
c. For large (up to 75 meters across) features or features that are not possible to see across, the position of the control marker on the control point should be given in the instructions. For example, the east side of the pond; the north side of the building.
d. If a very large (100 to 200 meters) feature is used, the control marker should be visible from most directions from at least 25 meters.
e. If a control point is near but not on a cons/imagesuous feature, this fact and the location of the marker should be clearly given; for example, 10 meters E of the junction. Avoid this kind of control point.
f. Use trees in control descriptions only if they are prominent and a totally different species from those surrounding. Never use bushes and fauna as control points.
g. Number control points in red on the master map.
h. For cross-country events, join all control points by a red line indicating the course's shape.