55. Local authority recognition of national policy statements---(1) In
 achieving the purpose of this Act, on receipt of a national policy
 statement, or a change to, or revocation of, a national policy
 statement, where the national policy statement deals with any matter
 relevant to the exercise of a local authority's functions, powers, or
 duties under this Act, the local authority shall---
   (a) Where there is any inconsistency or conflict between the national
         policy statement as so issued, changed, or revoked and any local
         authority statement or plan, in accordance with the First
         Schedule initiate all necessary changes to the policy statement
         or plan in order to remove that inconsistency or conflict:
   (b) Take all such other action as may be necessary in order to
         implement the national policy statement as so issued or changed,
         including---
           (i) Initiating a change to any policy statement or plan of
         that local authority in accordance with the First Schedule (or,
         in the case of a regional council, preparing a regional plan),
         to address any issue or achieve any objective of the national
         policy statement:
           (ii) Taking such other action as may be specified in the
         national policy statement.

   (2) Every local authority shall, as soon as practicable after receipt
 of a national policy statement or of a change to a national policy
 statement, give public notice of its decision in relation to that
 statement or change (including a decision to take no action where this
 Act does not require otherwise) and the reasons for that decision.