Any rule that prescribes or proscribes behavior during a ten-second interval, especially:

(chiefly Wikimedia jargon) It is acceptable to break rules in situations where it is beneficial not to follow them.

plural of bright-line rule

plural of five-second rule

plural of infield fly rule

plural of ten-second rule

plural of three-second rule

(law) The presumption that the failure of a party to produce a witness available to them indicates that the testimony of that witness would go against the party.

(law) The obligation of a barrister (in certain jurisdictions) to accept any work in a field in which they profess themselves competent to practise, at a court at which they normally appear, and at their usual rates.

(soccer) The prohibition of teammates closer to the opponents' goal than the person kicking or throwing the ball unless there are three opponents at least as close to their goal line.