Road Rules 2014
Historical version for 30 June 2015 to 31 August 2015 (accessed 5 August 2020 at 15:41) Current version
Part 8 Division 1 Rule 88
88   Left turn signs
(1)  If there is a left turn only sign at an intersection, a driver must turn left at the intersection.
Maximum penalty: 20 penalty units.
Note.
 For the meaning of left, see rule 351 (1).
(2)  If there is a left lane must turn left sign at an intersection, a driver who is in the left marked lane when entering the intersection must turn left at the intersection.
Maximum penalty: 20 penalty units.
Note.
 Marked lane is defined in the Dictionary.
 
Left turn only sign
Left lane must turn left sign