33 Both Nathan J in King's case and Mahoney JA in Rizzi's case seem to be using the word 'natural' as being synonymous with 'pre-existing' immediately prior to the relevant development. This also appears to be the approach adopted by the Tribunal in Tribe v Greater Geelong City Council (1999) 2 VPR 224, though the Tribunal there was not faced with any evidence which appeared to draw distinction between the ground levels in their totally undisturbed state or the ground levels as disturbed by the development in question.
34 In conformity with this approach, it would seem that the proper level from which to measure is not the level as set in the 1993 survey but the level which immediately pre-existed commencement of the subject development.
35 Mr Rantino employed a scale ruling on the south elevation of the approved building consent plans and demonstrated that the distance between the line shown on those plans as existing level and the top of the buildings as depicted on the elevation exceeded the 6m limit. Mr Bonnice in his evidence on behalf of Ms Benedetti, said that this portrayed a methodological error by Mr Rantino. It assumed that the line shown as pre-existing ground level was immediately at the foot of the structure being measured. In fact, Mr Bonnice said that the pre-existing ground level was depicted as at the site boundary not the foot of the structure. The plans submitted in support of the 2003 permit application considered by this Tribunal in 2004 made that distinction, specifically labelling the existing level line as being at the site boundary. The building plans for the present proposal do not make that distinction. It is surprising that the evidence as to the interpretation of pre-existing level was led from Mr Bonnice. Mr Lanera who drew the plans was present in the Tribunal but not called upon to give evidence. When challenged by Mr Chiappi earlier in the hearing as to whether she was going to call Mr Lanera as a witness, Ms O'Brien demurred. Eventually towards the end of the hearing she offered to call Mr Lanera solely for the purpose of allowing him to be cross-examined by Messrs Ratino and Chiappi. In the event neither of them asked for Mr Lanera to be put in the witness box. Given that the offer was made, I can draw no adverse inference as to Ms Benedetti's failure to call Mr Lanera as a witness.
36 Mr Bonnice produced a document prepared by Mr Lanera which extrapolated the Kennedy survey and contour map of 1993 onto the 2005 building plans. This plan shows that at no point taking the Kennedy contour map as the basis for natural level does the proposed addition stand more than 6m above ground level. The proposed addition is triangular in shape with its apex pointing to the south-east. Mr Lanera's plan measures the height of the building at four points, namely each of the three corners and also on the side of the addition facing south-west approximately mid-way along that side. At Point 1 the north-east corner Mr Lanera shows natural ground level at 101.56 thereby yielding a maximum height for the building of 107.56m by reference to the arbitrary datum, concluding that the total height of the building is 106.15m. At Point 2, being the south-east corner, the maximum height for the building would be 106.33m and Mr Lanera calculates it at 106.15. At Point 3, being a point approximately half-way along the south-west side of the addition, Mr Lanera calculates a maximum allowable height of 105.72m with an actual height of 105.7m, that is, the height is 20mm below the maximum allowable height. At Point 4, being the north-west corner, the maximum allowable height is calculated by Mr Lanera as 105.55m with an actual height of 105.45m. The roof therefore he said, is 100mm before the 6m height limit.
37 As some of these measurements are very close indeed. Given that the Benedettis have built their home and no doubt landscaped it, since the Kennedy survey of 1993, even in the absence of a natural ground line based on existing conditions immediately at the foot of the proposed new structure as distinct from at the site boundary, it would be reasonable to infer that save where cuts have been made in the ground, that the ground level will have been raised since 1994. Since this proposal goes so close to the limit on the 1993 levels, this would suggest that based on existing ground levels it probably exceeds the 6m limit. On that view of things the declaration sought as No. 3 should be made. Nevertheless, the consequences of making such a declaration would be grave indeed and what I have just said might be regarded as bordering on speculation. Ms O'Brien correctly drew attention to the fact that neither the Council as applicant nor Dr Dynon as joined party, had called any expert evidence on these issues. The cross-examination of Mr Bonnice by Messrs Rantino and Chiappi raised some anomalies in the 2005 plans and some matters which could not satisfactorily be explained. Nevertheless there was no affirmative expert evidence from the parties allied against Ms Benedetti supporting the making of proposed Declaration No. 3. Ms O'Brien submitted that the failure of the Council to call anyone from its building department enabled me to draw the inference that the evidence from any such expert from Council's Building Department would not have assisted its case Jones v Dunkel (1959) 101 CLR 298.
38 In the end I find myself in the same situation as the Tribunal in Tribe's case. Faced with evidence which is suggestive of a breach of the height limit but insufficiently conclusive to enable me confidently to make a finding to that effect on this important issue as the Tribunal in Tribe's case did, I believe the proper course therefore is to decline to make proposed Declaration 3.
39 As to the other two declarations, no separate discretionary issues were urged against their being made if the grounds for them were otherwise established.
40 I should say something about Ms O'Brien's contention that this application should have been made pursuant to Section 149A of the Planning and Environment Act rather than Section 149B. For ease of analysis I set out the two sections.