(3) As soon as practicable, but no later than 180 days, after the date on which a State submits (or resubmits in the case of prior disapproval) an application for the approval of a conservation plan the Secretary shall
(A) approve the conservation plan, and designate it as an approved conservation plan, if he determines that the plan
(i) meets the requirements set forth in section
2903 of this title, and
(ii) is substantial in character and design; or
(B) disapprove the conservation plan if he determines that
(i) the plan does not meet the requirements set forth in section
2903 of this title, or
(ii) to implement any part of the plan on the basis of the specifications, determinations, identifications, or priorities therein would threaten the natural stability and continued viability of any of the plan species concerned.
If the Secretary disapproves a plan, he shall give the State concerned a written statement of the reasons for disapproval and provide the State opportunity for consultation with respect to deficiencies in the plan and the modifications required for approval.