18 In my view, as the 16 September 2010 Direction revoked the 15 September 2010 Direction, the preliminary issue turns on whether the revocation in the 15 September 2010 Direction revoked the 4 June 2010 Direction in its application to the subject land, which was identified in Schedule 2 of the 15 September 2010 Direction.
19 There were originally submissions by all parties that in construing the 15 and 16 September 2010 Directions, statements supportive of the parties' respective constructions in planning circulars issued by the Department of Planning should be used. However, perhaps shrinking from the support that such statements provided for the Minister's construction, the applicant ultimately submitted that they should not be used.
20 In my opinion, statements in the planning circulars should not be used to construe the Directions. An analogy may be found in principles concerning the use of extrinsic material in the interpretation of a provision of a statute. Certain extrinsic material may be used if it is "capable of assisting in the ascertainment of the meaning of the provision": s 34 Interpretation Act 1987. However, statements as to legislative intention made in explanatory memoranda or by ministers, let alone other statements in parliamentary speeches, are rarely, if ever, capable of assisting in the meaning of a provision and cannot overcome the need to consider the words of the statute to ascertain its meaning: Saeed v Minister for Immigration and Citizenship [2010] HCA 23, 84 ALJR 507 at [31]; Harrison v Melhem [2008] NSWCA 67, 72 NSWLR 380 at [12]; Sheehan v State Rail Authority of NSW [2009] NSWCA 261 at [40]; Parks and Playgrounds Movement Inc v Newcastle City Council [2010] NSWLEC 231 at [80]. That is because the interpretation of statutes or other legal documents is concerned with the objective meaning of words in their context, not with what ministers, parliamentarians or authors subjectively intended them to mean. Statements by third parties, including a minister's department, as to what they think words in a statute mean are of no assistance in ascertaining their objective meaning. Similarly in the present case, statements by the Minister's Department as to what it thinks the Minister's Direction means are of no assistance in ascertaining the objective meaning of the Direction. Moreover, the relevant planning circulars appear to have been issued shortly after the Directions to which they respectively relate were made and no analogy is to be found in principles concerning the interpretation of statutes or other legal documents which would permit subsequent material or conduct to be used as an aid to interpretation.