All poultry products inspected at any official establishment under the authority of this chapter and found to be not adulterated, shall at the time they leave the establishment bear, in distinctly legible form, on their shipping containers and immediate containers as the Secretary may require, the information required under paragraph (h) of section 453 of this title. In addition, the Secretary whenever he determines such action is practicable and necessary for the protection of the public, may require nonconsumer packaged carcasses at the time they leave the establishment to bear directly thereon in distinctly legible form any information required under such paragraph (h).