Pouches, liners, or containers having product contact surfaces after filling shall be folded or closed and sealed in a sanitary manner, preferably by mechanical means, so as to assure against contamination. Each container shall be coded in such a manner as to be easily identified as to date of manufacture by lot or sublot number.
Ill. Admin. Code tit. 77, § 785.890
Adopted at 11 Ill. Reg. 2356, effective February 1, 1987