Reg 155 has this statement:
(2) For the purposes of subregulation (1), straight and steady stalls or turns in which the angle of bank does not exceed 60 degrees shall be deemed not to be acrobatic flight.
So, my opinion is therefore that such stalls do not need to be performed only in day VFR in an aerobatic aeroplane.
I don't see a reason to have subregulation (2) at all unless somewhere there is a rule stating that such stalls are aerobatics - perhaps there was and it no longer exists or there is and many of us don't understand it (Ixixly explains).
Subregulation (2) excludes sub (1) but not sub (3) indicating that subregulation (3) applies to those stalls i.e. a minimum height of 3,000 ft.
Hopefully clarified with the CASRs coming in the fullness of time.