A Rules for Foot Orienteering Events - Orienteering USA

A.28.8 If competitors are late for their start through their own fault they shall be started
as soon as practically possible. The actual time of their start shall be noted on
their map, or a start list at the start location. Their time will still be computed,
however, from their original start time given in the official start list except as
below.
A.28.9 At the discretion of the organizer late starters may have their actual start times
substituted for their official start times when this can be done for all late starters
within a class on the same day.
A.28.10 If through the fault of the organizer any competitors miss their start they
shall be given a new one.
A.28.11 Events using electronic punching may use an electronic start punch to
determine the actual start time for timing purposes.
A.29 Finish/Timing
A.29.1 After crossing the finish line the competitors shall hand in their control cards or
move to the download station. When required by the organizer, competitors may
have to turn in their maps at the finish line.
A.29.2 At the finish there shall be first aid supplies and refreshments.
A.29.3 The finishing time shall be measured when the competitor’s chest crosses the
finish line or when the competitor punches at the finish line. Times will be
truncated to full seconds, except in sprint races, when timing to the tenth of a
second may be allowed. Times shall be given in minutes and seconds, except in
sprint races when times may be given in minutes, seconds, and tenths of a second.
A.29.4 Except in competitions with mass or chasing starts, if more than one competitor
has the same running time, they shall be given the same finishing place, and the
results should show the same place number for both. When practical they should
be listed in the order in which they started.
A.29.5 In competitions with mass or chasing starts, finish judges shall rule on the final
placing. Runners finishing together will be placed in finish order. If this occurs at
a relay event, the position of the team is determined by the finish order of the last
leg runner.
A.29.6 Competitors who omit one or more control marks shall be listed as "did not
finish" (DNF). If the absence of a control mark is not the fault of the competitor
(i.e. missing or broken punch) and the competitor states that he/she visited all the
control locations in the proper sequence, in the absence of proof to the contrary
the competitor will not be disqualified.
A.29.7 Competitors who mark at an incorrect control in place of the correct one shall be
listed as "mispunch" (MSP).