(a) You may submit a timely amendment to your filed GRAS notice, to update your GRAS notice or in response to a question from us, before we respond to your notice by letter in accordance with §170.265(b)(1) or cease to evaluate your notice in accordance with §170.265(b)(3).

(b) At any time before we respond to your GRAS notice in accordance with §170.265(b)(1), you may request in writing that we cease to evaluate your GRAS notice. Your request does not preclude you from submitting a future GRAS notice in accordance with this subpart with respect to the notified substance.