7 C.F.R. § 66.116
(a) Disclosure of bioengineered food by exempt entities. If a food on the List of Bioengineered Foods is subject to disclosure, a very small food manufacturer, restaurant, or similar retail food establishment may voluntarily provide that disclosure. The disclosure must be in one or more of the forms described in this paragraph (a).
(b) Disclosure of foods derived from bioengineering. For foods or food ingredients that do not meet paragraph (1) of the definition of bioengineered food in § 66.1, that do not qualify as a factor or condition under paragraph (2) of the definition of bioengineered food in § 66.1, that are not exempt from disclosure under § 66.5, and that are derived from a food on the List of Bioengineered Foods, regulated entities may disclose such foods with one of the disclosures described in this paragraph (b).
(2) A symbol disclosure using the following symbol:
