Sesame is not currently included in the group of eight major allergens specified in the regulation to be declared in clear terms if included on the label. "The FDA does not have the authority to amend the eight major food allergens established by FALCPA; however, it has the authority under the Federal Food, Drug, and Cosmetic Act to require labeling for other food allergens not covered by the requirements in FALCPA."
This is a draft, so comments can be made by stakeholders.
US FDA Constituent Updates Center for Food Safety and Applied Nutrition
https://www.fda.gov/food/cfsan-constituent-updates/fda-issues-draft-guidance-industry-voluntary-disclosure-sesame-when-added-flavoring-or-spice
FDA Issues Draft Guidance for Industry on Voluntary Disclosure of Sesame When Added as Flavoring or Spice
Constituent Update
November 10, 2020
US FDA Constituent Updates Center for Food Safety and Applied Nutrition
https://www.fda.gov/food/cfsan-constituent-updates/fda-issues-draft-guidance-industry-voluntary-disclosure-sesame-when-added-flavoring-or-spice
FDA Issues Draft Guidance for Industry on Voluntary Disclosure of Sesame When Added as Flavoring or Spice
Constituent Update
November 10, 2020