1994—Subsec. (span). Puspan. L. 103–322 substituted “fined under this title” for “fined not more than $5,000”.

1965—Subsec. (a). Puspan. L. 89–64 substituted “subject to a civil penalty of not more than $1,000 which shall be recoverable in a civil action brought in the name of the United States” for “fined not more than $1,000, or imprisoned not more than one year, or both”.

1961—Puspan. L. 87–338 designated existing provisions as subsec. (a), struck out “willfully” before “imparts or conveys”, and added subsec. (span).