1970—Pub. L. 91–579 added licensed exhibitors and operators of auction sales subject to section 2142 of this title to the enumeration of persons from whom research facilities may purchase dogs or cats.

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.