The Vedanta Sutras of Badarayana, Commentary by Sankara (SBE38), tr. by George Thibaut  at sacred-texts.com
13. There being no specification (the rule does) not (specially apply to him who knows).
In passages such as 'Performing works here let a man live' &c., which state definite rules, there is no specification
of him who knows, since the definite rule is enjoined without any such specification.