Any rule that prescribes or proscribes behavior in a three-second interval, especially

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

plural of Las Vegas rule

Alternative form of Vegas 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.

(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.

(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.

(idiomatic) Examine carefully and thoroughly.

(Wikimedia jargon) On the English Wikipedia, a rule that states that an editor must not perform more than three reverts on a single page—whether involving the same or different material—within a 24-hour period.

(law) A legal principle that holds an original copy of a document as superior evidence.