The 2007 USATF Rule 245.1 states "The order in which
the athletes cross the finish line will be the official finish
position." Further, Rule 245.3 - regarding transponder
timing - "the actual time elapsed between an athlete
reaching the starting line and finish line can be made known
to the athlete, but will not be considered as official time."
In short, official time per USATF rule is gun time.
Also, USATF Rule 165.16 covers the use of transponder
timing systems (i.e., the chip) and Rule 165.16(h) states
that "times for other competitors will be adjusted, based
on the official winning time." In other words, "chip"
timing cannot be used for official time(s) nor records unless
the "chip" time is properly adjusted (i.e., gun
time) except for LDR Masters age group records if the record
setter wins his/her age group and the timing mats are properly
placed before the start line and after the finish line (Rule
Competition Rule book here.
For more information email
Mac's Race Timing Service
169 W. Ross St.
Batesville, AR 72501
Phone: (870) 793-2464
Cell: (870) 307-9850