1976—Pub. L. 94–279 substituted “in commerce” for “affecting commerce” in two places.

1970—Pub. L. 91–579 extended requirements for recordkeeping and humane standards to exhibitors and operators of auction sales, with such requirements to apply to animals as defined instead of only to cats and dogs when transactions in auction sales are affecting commerce, and required operators of auction sales to obtain a license when he sells cats or dogs and such transactions are affecting commerce, upon payment of fee prescribed by the Secretary.

Amendment by Pub. L. 91–579 effective one year after Dec. 24, 1970, see section 23 of Pub. L. 91–579, set out as a note under section 2131 of this title.