If the difference you are concerned about is the difference between 2.25 and 2.3? I can see that this could easily happen with the interpolation method used. AS 3995 and AS 1170.2 used to have the same table but it was changed in later versions of AS 1170. The program factors the value returned by the AS 3995 method and really, there should be a completely new and independent subroutine for the table in AS 1170.2.
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