Code of Federal Regulations Title 9. Animals and Animal Products § 9.201.72 Scales;  testing of

(a) As a stockyard owner, swine contractor, market agency, dealer, packer, or live poultry dealer who weighs livestock, live poultry, or feed for purposes of purchase, sale, acquisition, payment, or settlement of livestock or live poultry, or who weighs livestock carcasses for the purpose of purchase on a carcass weight basis, or who furnishes scales for such purposes, you must have your scales tested by competent persons at least twice during each calendar year. You must complete the first of the two scale tests between January 1 and June 30 of the calendar year. The remaining scale test must be completed between July 1 and December 31 of the calendar year. You must have a minimum period of 120 days between these two tests. More frequent testing will be required in cases where the scale does not maintain accuracy between tests. Except that if scales are used on a limited seasonal basis (during any continuous 8–month period) for purposes of purchase, sale, acquisition, payment or settlement, the stockyard owner, swine contractor, market agency, dealer, live poultry dealer, or packer using such scales may use the scales within a 8–month period following each test.

(b) As a stockyard owner, swine contractor, market agency, dealer, packer, or live poultry dealer who weighs livestock, livestock carcasses, live poultry, or feed for purposes of purchase, sale, acquisition, payment, or settlement of livestock, livestock carcasses or live poultry, you must furnish reports of tests and inspections on forms approved by the Administrator. You must retain one copy of the test and inspection report for yourself, and file a second copy with the P&SP regional office for the geographical region where the scale is located.

(c) When scales used for weighing livestock, livestock carcasses, live poultry, or feed are tested and inspected by a State agency, municipality, or other governmental subdivision, the forms used by such agency for reporting such scale tests and inspections may be accepted in lieu of the forms approved for this same purpose by the Administrator if the forms contain substantially the same information.