; or (B) other applicable international obligations. (3) Exception to carry out or assist law enforcement activities Sanctions under subsection (c)(2) shall not apply with respect to an alien if admitting or paroling the alien into the United States is necessary to carry out or assist law enforcement activity in the United States. (e) Waiver The President may waive the application of sanctions under this section with respect to a foreign person for renewable periods of not more than 180 days each if the President determines and submits to the appropriate congressional committees a report that contains a determination of the President that such a waiver is in the national security interests of the United States. (f) Implementation