((a)) ** Prohibition** The President shall take all reasonable steps to ensure that assistance under this chapter and the Arms Export Control Act [ et seq.] is not provided to or through any individual or entity that the President knows or has reason to believe—

((1)) has been convicted of a violation of, or a conspiracy to violate, any law or regulation of the United States, a State or the District of Columbia, or a foreign country relating to narcotic or psychotropic drugs or other controlled substances; or

((2)) is or has been an illicit trafficker in any such controlled substance or is or has been a knowing assistor, abettor, conspirator, or colluder with others in the illicit trafficking in any such substance.

((b)) ** Regulations** The President shall issue regulations specifying the steps to be taken in carrying out this section.

((c)) ** Congressional review of regulations** Regulations issued pursuant to subsection (b) shall be submitted to the Congress before they take effect.