(a) Prior to March 1, 1992, or in response to a written objection filed pursuant to paragraph (2) of subdivision (b) of Section 13131.1, the department may determine, with the concurrence of the Office of Environmental Health Hazard Assessment, that one or more of the mandatory health effects studies are not required in order to evaluate pesticide active ingredients other than those identified pursuant to subdivision (a) of Section 13127. This determination may be made only in accordance with one or more of the following criteria:

1. (1) The ingredient has been classified as “Generally Recognized as Safe” by the United States Food and Drug Administration.
2. (2) The study is not physically possible due to the nature of the ingredient.
3. (3) The department has on file toxicological data that is adequate for the assessment of the potential adverse health effects of the ingredient, and the studies relied upon for that purpose are of the same study type, are scientifically valid, and, when taken together, are of a power and sensitivity equivalent to the studies that would be waived pursuant to this subdivision.