NALL Laws
Brisbane City Council has a protection mechanism for established trees called the Natural Asset Local Law (NALL). The trees are not necessarily native but are considered to contribute to the landscape character of the city.
To ascertain their eligibility for protection, certain species must meet a minimum diameter criteria. Originally these diameters were measured at a height of 1 metre. This height was unique to BCC and could give misleading readings because of butt swell and taper.
Since January 2014 the height for measurement is now set at 1.4 metres which is in keeping with industry practice. A wonderful and positive change which is to be applauded.