15 CFR § 750.2 - Processing of Classification Requests and Advisory Opinions.
(a) Classification requests. All classification requests submitted in accordance with procedures described in § 748.3 (a) and (b) of the EAR will be answered within 14 calendar days after receipt. All responses will inform the person of the proper classification (e.g., whether or not the item is subject to the Export Administration Regulations (EAR) and, if applicable, the appropriate Export Control Classification Number [ECCN]).
(b) Advisory Opinion requests. All advisory opinions submitted in accordance with procedures described in § 748.3(a) and (c) of the EAR will be answered within 30 calendar days after receipt. Requests to obtain Validated End-User authorization will be resolved within 30 calendar days as described in supplement no. 9 to Part 748 of the EAR.