42 CFR 130.32 - How and when will the Secretary determine the order of receipt of petitions?
(a) The order that the petition was received by the Secretary will be determined by the postmark date or the date indicated by a commercial carrier or the U.S. Postal Service, in accordance with § 130.31(f).
(b) If the Secretary receives more than one petition which is either postmarked or dated by a commercial carrier or the U.S. Postal Service on the same date, the Department will conduct a random selection of each day's submissions to determine the order within each group of petitions.
(c) A number will be assigned to each petition indicating the order in which it is selected.