A model rocket experiencing a catastrophic failure shall not be given a disqualification. The flight may or
may not be considered as an official flight, only if in the opinion of the Range Safety Officer the model performed
a safe and stable flight, and at least nominally complied with the competition rules (e.g., a glider glided). The
contestant shall in this situation have the option of having such a flight ruled as either official or unofficial.
If the model did not meet these requirements, then it shall be ruled an unofficial flight.
When he has the option, the contestant shall inform the applicable Contest Official of his/her decision to accept or
reject the flight as an official flight as soon as possible; but in any case, prior to any subsequent flight by the
contestant in that event. The contestant shall be permitted to substitute another model; in the case of craftsmanship
events, or other events as specified, an identical model must be substituted, although it does not have to exhibit
the of craftsmanship and detail of the original.