(a) Except to the extent provided in paragraph (b) of this section, and notwithstanding the existence of any rights or obligations conferred or imposed by any contract entered into or any license or permit granted prior to the effective date, the importation into, or exportation from, the United States on or after July 30, 2003, of any rough diamond, from whatever source, is prohibited, unless the rough diamond has been controlled through the Kimberley Process Certification Scheme.

(b) The prohibitions in paragraph (a) of this section regarding the importation into, or exportation from, the United States of any rough diamond not controlled through the Kimberley Process Certification Scheme do not apply to an importation from, or exportation to, any country with respect to which the Secretary of State has granted a waiver pursuant to section 4(b) of the Clean Diamond Trade Act (Pub. L. 108-19) and section 2(a)(i) of Executive Order 13312.

(a) Notwithstanding the existence of any rights or obligations conferred or imposed by any contract entered into or any license or permit granted prior to July 30, 2003, any transaction by a United States person anywhere, or any transaction that occurs in whole or in part within the United States, on or after the effective date that evades or avoids, or has the purpose of evading or avoiding, or attempts to violate, any of the prohibitions set forth in this part is prohibited.

(b) Notwithstanding the existence of any rights or obligations conferred or imposed by any contract entered into or any license or permit granted prior to July 30, 2003, any conspiracy formed to violate any of the prohibitions of this part is prohibited.