Section 8.6 - Preliminary environmental review(a) Unless an operator has determined to prepare an IEE or CEE, the operator shall conduct a preliminary environmental review that assesses the potential direct and reasonably foreseeable indirect impacts on the Antarctic environment of the proposed expedition. A Preliminary Environmental Review Memorandum (PERM) shall contain sufficient detail to assess whether the proposed activity may have less than a minor or transitory impact, and shall be submitted to the EPA for review no less than 180 days before the proposed departure of the expedition. The EPA, in consultation with other interested federal agencies, will review the PERM to determine if it is sufficient to demonstrate that the activity will have less than a minor or transitory impact or whether additional environmental documentation, i.e., an IEE or CEE, is required to meet the obligations of Article 8 and Annex I of the Protocol. The EPA will provide its comments to the operator within fifteen (15) days of receipt of the PERM, and the operator shall have seventy-five (75) days to prepare a revised PERM or an IEE, if necessary. Following the final response from the operator, EPA may make a finding that the environmental documentation submitted does not meet the requirements of Article 8 and Annex I of the Protocol and the provisions of this part. This finding will be made with the concurrence of the National Science Foundation. If EPA does not provide such notice within thirty (30) days, the operator will be deemed to have met the requirements of this part provided that any required procedures, which may include appropriate monitoring, are put in place to assess and verify the impact of the activity.(b) If EPA recommends an IEE and one is prepared and submitted within the seventy-five (75) day response period, it will be reviewed under the time frames set out for an IEE in § 8.7 . If EPA recommends a CEE and one is prepared, it will be reviewed under the time frames set out for a CEE in § 8.8 .