ANSWER
According to General Standard for The Labelling of Prepackaged Foods (CXS 1-1985), a food additive carried over into foods at a level less than that required to achieve a technological function are exempted from declaration in the list of ingredients. The exemption does not apply to food additives and processing aids listed in section 4.2.1.4. which is known to cause hypersensitivity.
Reference
Codex Alimentarius Commission. (2018). General Standard for The Labelling of Prepackaged Foods (CXS 1-1985).