50 C.F.R. § 216.153 Permissible methods of taking; mitigation.
Title 50 - Wildlife and Fisheries
(a) Under a Letter of Authorization issued pursuant to §216.106, the U.S. Navy may incidentally, but not intentionally, take those marine mammal species specified in §216.151(b) by Level B harassment, in the course of conducting target missile launch activities within the area described in §216.151(a), provided all terms, conditions, and requirements of these regulations and such Letter of Authorization are complied with. (b) The activity specified in §216.151 must be conducted in a manner that minimizes, to the greatest extent possible, adverse impacts on marine mammals and their habitat. When conducting these activities, the following mitigation measures must be utilized: (1) The holder of the Letter of Authorization must prohibit personnel from entering pinniped haul-out sites below the missile's predicted flight path for 2 hours prior to planned missile launches. (2) The holder of the Letter of Authorization must avoid launch activities during harbor seal pupping season (February to April), when operationally practicable. (3) The holder of this Authorization must limit launch activities during other pinniped pupping seasons, when operationally practicable. (4) The holder of the Letter of Authorization must not launch Vandal target missiles from the Alpha Complex at low elevation (less than 1,000 feet (304.8 m) on launch azimuths that pass close to pinniped haul-out sites). (5) The holder of the Letter of Authorization must avoid, where practicable, launching multiple target missiles in quick succession over haul-out sites, especially when young pups are present. (6) The holder of the Letter of Authorization must limit launch activities during nighttime hours when operationally practicable. (7) Aircraft and helicopter flight paths must maintain a minimum altitude of 1,000 feet (304.8 m) from pinniped haul-outs. (8) If injurious or lethal take is discovered during monitoring conducted under §216.155, the holder of the Letter of Authorization must contact the Regional Administrator, Southwest Region, National Marine Fisheries Service, or his/her designee, at (562) 980–4023 within 48 hours and, in cooperation with the National Marine Fisheries Service, launch procedure, mitigation measures, and monitoring methods must be reviewed and appropriate changes made prior to the next launch. (9) If post-test surveys determine that an injurious or lethal take of a marine mammal has occurred, the test procedure and the monitoring methods must be reviewed and appropriate changes must be made prior to conducting the next missile launch.
Title 50: Wildlife and Fisheries
PART 216—REGULATIONS GOVERNING THE TAKING AND IMPORTING OF MARINE MAMMALS
Subpart N—Taking of Marine Mammals Incidental to Missile Launch Operations from San Nicolas Island, CA
§ 216.153 Permissible methods of taking; mitigation.

