(a) It shall be unlawful for any person knowingly and willfully to give or accept any kickback or any illegal payment in connection with any qualified campaign expenses of any eligible candidate or his or her authorized committee(s).

(b) It shall be unlawful for the national committee of a major or minor party knowingly and willfully to give or accept any kickback or any illegal payment in connection with any expense incurred by such committee with respect to a Presidential nominating convention.