Section 217.30 - Specified activity and specified geographical region(a) Regulations in this subpart apply only to Hilcorp LLC (Hilcorp) and those persons it authorizes or funds to conduct activities on its behalf for the taking of marine mammals that occurs in the areas outlined in paragraph (b) of this section and that occurs incidental to construction, maintenance, and operation of the Liberty Drilling and Production Island (LDPI) and associated infrastructure.(b) The taking of marine mammals by Hilcorp may be authorized in a Letter of Authorization (LOA) only if it occurs within the Beaufort Sea, Alaska.