; and (3) continuing protections under the Endangered Species Act of 1973 ( 16 U.S.C. 1531 et seq. ) for the entity of grizzly bear (Ursus arctos horribilis) in the conterminous lower 48 States of the United States to not later than the date that is 2 years after the date of enactment of this Act provides adequate time for the Secretary of the Interior (referred to in this Act as the Secretary ) to determine, by regulation promulgated in accordance with section 4(a) of that Act ( 16 U.S.C. 1533(a) ), whether any distinct population segment of grizzly bear that interbreeds when mature is an endangered species or a threatened species that should be added to the List of Endangered and Threatened Wildlife pursuant to that Act. 3. Determination of grizzly bear species under the Endangered Species Act of 1973 (a) In general Not later than 2 years after the date of enactment of this Act, the Secretary shall remove the entity of grizzly bear (Ursus arctos horribilis) in the conterminous lower 48 States of the United States and the associated entity of grizzly bear (Ursus arctos horribilis) in portions of the States of Idaho and Montana listed as an experimental population from the List of Endangered and Threatened Wildlife under section 17.11(h) of title 50, Code of Federal Regulations (or a successor regulation). (b) Effect on other determinations Nothing in this Act limits the ability of the Secretary to make future determinations of threatened species or endangered species, by regulation promulgated in accordance with section 4(a) of the Endangered Species Act of 1973 ( 16 U.S.C. 1533(a) ), for any distinct population segment of brown bear (Ursus arctos) that interbreeds when mature, including any distinct population segment of grizzly bear (Ursus arctos horribilis) or other brown bear subspecies, subject to the conditions that the Secretary shall not— (1) add any distinct population segment of grizzly bear (Ursus arctos horribilis) to the List of Endangered and Threatened Wildlife under section 17.11(h) of title 50,