A Rules for Foot Orienteering Events - Orienteering USA

A.16.8 When the competition map has not previously been used or distributed and an
earlier map of the terrain exists the earlier map shall be posted in the competition
center and if possible sold at a reasonable and customary price prior to and at the
event.
A.16.9 Course markings on the map shall follow the ISOM or ISSOM as applicable.
A.16.10 Competitors who cannot properly see the color used to mark their maps
may have their courses redrawn in a color they can properly see by making their
request to a registration official. If necessary, the competitor shall be given a new
start time after the redrawn map is available.
A.17 Courses
A.17.1 The IOF Principles for Course Planning (Appendix 2 of Foot Orienteering
Rules) and Orienteering USA Course Design Guidelines should be referenced as
guidance for setting the courses.
A.17.2 The characteristics of the courses, in particular the map reading and route choice
requirements, shall be appropriate to the classes for which they are intended. The
navigating ability and concentration of the competitors shall be tested.
A.17.3 The progression from White to Yellow to Orange to Brown through Blue is one of
increased length and technical difficulty; the technical difficulty of Brown, Green,
Red, and Blue is to be equivalent, at the expert level, with only a difference in
physical requirements.
A.17.4 The order of visiting the control locations shall be prescribed by the organizer and
observed by the competitors. If visiting the control locations out of order is likely
to be advantageous then the organizer shall check that they are visited in the
proper order.
A.17.5 Any marked route or crossings included on a course shall be indicated on the
map.
A.17.6 Required routes (i.e. those that runners must follow) shall be clearly marked so
that all competitors can follow them without any possibility of confusion. (For
example, routes may be marked with orange ribbons or streamers.) The method of
marking shall be explained in the Event Information.
A.17.7 The course shall be set so as to avoid damage to the terrain, property, or the
entering of out-of-bounds and hazardous areas.
A.17.8 The Event Organizer shall use all reasonable efforts to mark hazardous terrain
features that are known to the Organizer both on the map and in the terrain. The
method of marking in the terrain shall be clearly visible to competitors, and shall
be explained in the Event Information.
A.17.9 When courses cross deep water or dangerous gorges, control locations shall be
located at safe crossing points.