1976—Subsec. (a). Pub. L. 94–410, § 3(a), (c), struck out “in commerce” after “or handling” and substituted “livestock” for “live stock”.

Subsec. (b). Pub. L. 94–410, § 3(b), inserted provisions dealing with authority of Secretary to assess a civil penalty for violations and, upon failure to pay, procedure for recovery of such penalty.

1968—Subsec. (a). Pub. L. 90–446 inserted “determining whether persons should be authorized to operate at stockyards, or with” after “in connection with”.

1958—Subsec. (a). Pub. L. 85–909 struck out “at a stockyard” after “in commerce”.