50 CFR §217.66

1. (a)To incidentally take marine mammals pursuant to this subpart, the USSF must apply for and obtain an LOA in accordance with § 216.106 of this chapter.
2. (b)An LOA, unless suspended or revoked, may be effective for a period of time not to exceed expiration of this subpart.
3. (c)If an LOA expires prior to the expiration date of this subpart, the USSF may apply for and obtain a renewal LOA.
4. (d)In the event of projected changes to the activity or to mitigation, monitoring, or reporting (excluding changes made pursuant to the adaptive management provision of § 217.67(c)(1) required by an LOA, USSF must apply for and obtain a modification of the LOA as described in § 217.67.
5. (e)Each LOA will set forth:
   1. (1)Permissible methods of incidental taking;
   2. (2)Means of effecting the least practicable adverse impact (i.e., mitigation) on the species and its habitat; and
   3. (3)Requirements for monitoring and reporting.
6. (f)Issuance of the LOA shall be based on a determination that the level of taking will be consistent with the findings made for the total taking allowable under this subpart.
7. (g)Notice of issuance or denial of a LOA shall be published in the Federal Register within 30 days of a determination.