CFR > Title 50 - Wildlife and Fisheries > CHAPTER II—NATIONAL MARINE FISHERIES SERVICE, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE > SUBCHAPTER C—MARINE MAMMALS (Parts 216–229) > PART 216—REGULATIONS GOVERNING THE TAKING AND IMPORTING OF MARINE MAMMALS > SUBPART O—Taking of Marine Mammals Incidental to Shock Testing the USS MESA VERDE (LPD 19) by Detonation of Conventional Explosives in the Offshore Waters of the U.S. Atlantic Coast (§216. > 216.166—Modifications to the Letter of Authorization.

216.166—Modifications to the Letter of Authorization.

(a) Except as provided in paragraph (b) of this section, no substantive modification, including withdrawal or suspension, to a Letter of Authorization issued pursuant to § 216.106 and subject to the provisions of this subpart shall be made until after notice and an opportunity for public comment.
(b) If the Assistant Administrator determines that an emergency exists that poses a significant risk to the well-being of the species or stocks of marine mammals specified in § 216.151(b), the Letter of Authorization may be substantively modified without prior notification and an opportunity for public comment. Notification will be published in the Federal Register subsequent to the action.