Any person who violates the provisions of section 458, 459, 460, 463, or 466 of this title shall be fined not more than $1,000 or imprisoned not more than one year, or both; but if such violation involves intent to defraud, or any distribution or attempted distribution of an article that is adulterated (except as defined in section 453(g)(8) of this title), such person shall be fined not more than $10,000 or imprisoned not more than three years, or both. When construing or enforcing the provisions of said sections the act, omission, or failure of any person acting for or employed by any individual, partnership, corporation, or association within the scope of his employment or office shall in every case be deemed the act, omission, or failure of such individual, partnership, corporation, or association, as well as of such person.