20880302_ferences__July_2014_FIDE_Laws___FIDE_rule
[0] 2. [USCF rule] The director will correct illegal moves observed unless either player has less than five minutes remaining in the time control. (On the other hand, variation 11H1 is often used, although not typically announced. Under this variation, the director does not correct illegal moves unless a player makes a claim.) Other rule violations (such as "touch move") require the opponent to make a claim. [FIDE rule] 
The arbiter will correct all observed rules violations (such as illegal moves and "touch move" violations) even if the opponent does not make a claim. (However, the opponent may make a claim if the arbiter does not observe the violation.)
The United States Chess Federation - USCF - FIDE Rule Differences (July 2014 FIDE Laws)
FIDE rule