(a) Each shipping container of any meat, meat food product, or meat by-product inspected under the authority of this act and found to be wholesome and not adulterated, at the time such product leaves an establishment, shall bear, in distinctly legible form, the official inspection mark and the approved plant number of the establishment in which the contents were processed. Each immediate container of any meat, meat food product or meat by-product inspected under the authority of this act and found to be wholesome and not adulterated shall bear at the time such product leaves the establishment, in addition to the official inspection mark, in distinctly legible form, the name of the product, a statement of ingredients if fabricated from two or more ingredients, the net weight or other appropriate measure of the contents, the name and address of the processor and the approved plant number of the establishment in which the contents were processed. The name and address of the distributor may be used in lieu of the name and address of the processor if the approved plant number is used to identify the establishment in which the article was prepared and packed. Each livestock carcass and each primal part of such a carcass shall bear the official inspection mark and approved plant number of the establishment. The secretary may by rules or regulations require additional marks or label information to appear on livestock carcasses or parts thereof, meat food products or meat by-products when they leave an establishment or at the time of their transportation or sale in this State, and he may permit reasonable variations and grant exemptions from the marking and labeling requirements of this paragraph in any manner not in conflict with the purposes of this act. Marks and labels required under this paragraph shall be applied only by, or under the supervision of, an inspector.

(b) The use of any written, printed or graphic matter upon or accompanying any livestock carcass, or part thereof, meat food product or meat by-product inspected or required to be inspected pursuant to the provisions of this act, or the container thereof, which is false or misleading in any particular is prohibited. No livestock carcasses or parts thereof, meat food products or meat by-products inspected or required to be inspected pursuant to the provisions of this act shall be sold or offered for sale by any person, firm, or corporation under any false or deceptive name; but established trade names which are usual to such articles and which are not false or deceptive and which shall be approved by the secretary are permitted. If the secretary has reason to believe that any label in use or prepared for use is false or misleading in any particular, he may direct that the use of the label be withheld unless it is modified in such manner as he may prescribe so that it will not be false or misleading. If the person using or proposing to use the label does not accept the determination of the secretary, he may request a hearing, but the use of the label shall, if the secretary so directs be withheld pending hearing and final determination by the secretary.