Section 411(b) of Pub. L. 101–381 provided that: “Sections 2680 and 2681 of part E of title XXVI of the Public Health Service Act [sections 300ff–80 and 300ff–81 of this title], as added by subsection (a) of this section, shall take effect upon the date of the enactment of this Act [Aug. 18, 1990]. Such part shall otherwise take effect upon the expiration of the 30-day period beginning on the date on which the Secretary issues guidelines under section 2681 (a).”