(1) If an act for which a reward has been promised is undertaken more than once, then the reward is due to the person who undertook the act first.
(2) If the act has been undertaken simultaneously by more than one person, then each is entitled to an equal portion of the reward. Where the reward cannot be shared due to its nature, or if, according to the terms of the promise of a reward, only one person is to be given the reward, then the matter is decided by drawing lots.