American Football Rules IFAF Approved Ruling 3-3-5:I-V

I. At the end of a play, with the game clock running, the referee notices that A22 is bleeding. RULING: The referee stops the clock and declares an injury timeout. A22 leaves the field of play (or the end zone) for treatment by appropriate medical personnel. Unless there is also an injury to a Team B player the play clock is set to 25 seconds and starts on the ready-for-play signal (Rule 3-2-4-c-4). [Cited by 3-3-2-e-5, 3-3-5-a-4]
II. After being treated for a bleeding or oozing wound, A22 (A.R. 3-3-5:I) attempts to enter the game before the next snap. RULING: A22 must remain out of the game for at least one play. In any event, he may return only on the approval of his team’s medical personnel. [Cited by 3-3-2-e-5, 3-3-5-a-4]
III. B52’s jersey has blood spots on it. RULING: Unless the official determines that the jersey is saturated with blood, B52 may remain in the game. (Note: Saturated is defined as soaked with moisture or drenched. If blood has penetrated through a garment to the skin or can
be transferred to another player or game official, the garment is saturated.) [Cited by 3-3-2-e-5, 3-3-5-a-4]
IV. An official notices that blood has soaked through B10’s jersey. RULING: B10 must leave the game until medical personnel have determined if the jersey must be replaced. [Cited by
3-3-2-e-5, 3-3-5-a-4]
V. B10 tackles A12. An official determines that B10’s jersey is saturated with blood from a cut on A12’s arm. RULING: Both players must leave the game – A12 for treatment of his open wound, B10 for a determination by medical personnel as to whether he has to replace his jersey. [Cited by 3-3-2-e-5, 3-3-5-a-4]