The Sydney harbour no fly zones or restricted areas are promulgated in the AIP by Air Services Australia in the Designated Airspace Handbook, under CASA regulation.
AIP DAH Excerpt:
SECTION 13 – PRD AREAS
Conditional RA (Restricted Area) Status
In order to assist with shared use of airspace, all restricted areas have been allocated an “RA Status”. This status will give an indication as to the likelihood of obtaining a clearance to fly through restricted airspace. NOTAMs may be issued to indicate changes to the RA Status; which should be checked prior to flight planning.
RA STATUS LEGEND:
Conditional RA 1: Pilots may flight plan through the Restricted Area and under normal circumstances expect a clearance from ATC.
Conditional RA 2: Pilots must not flight plan through the Restricted Area unless on a route specified in ERSA GEN FPR or under agreement with the Department of Defence, however a clearance from ATC is not assured. Other tracking may be offered through the Restricted Area on
a tactical basis.
Conditional
RA 3:
Pilots must not flight plan through the Restricted Area and clearances will not be available.
<snip>
YMMM/R405A SYDNEY
CONDITIONAL STATUS:
RA3
HELICOPTERS & SEAPLANES
LATERAL LIMITS: 33 50 44S 151 07 48E 33 50 36S 151 07 11E
then along STH BANK PARRAMATTA RVR 8 to 33 50 10S 151 06 14E
then along S BANK PARRAMATTA RVR 2 to 33 49 37S 151 05 37E
then along S BANK PARRAMATTA RVR 9 to 33 49 32S 151 05 18E
then along the clockwise arc of a circle of 8.50NM radius centred on
33 56 38S 151 10 57E (SY/DME) to 33 48 07S 151 10 53E
then along
THE PACIFIC HWY 3 to 33 51 10S 151 12 41E
33 51 20S 151 12 28E
then along THE S BANK PARRAMATTA RVR to 33 52 27S 151 11 59E
then along S BANK PARRAMATTA RVR 6 to 33 51 33S 151 11 45E
then along S BANK PARRAMATTA RVR 5 to 33 50 58S 151 10 50E
33 50 50S 151 10 20E, 33 50 57S 151 09 53E
33 50 51S 151 09 19E
then along S BANK PARRAMATTA RVR 4 to 33 50 43S 151 08 38E
33 50 52S 151 08 29E
then along S BANK PARRAMATTA RVR 3 to 33 50 44S 151 07 48E
VERTICAL LIMITS:
SFC - 500
HOURS OF ACTIVITY: HJ
CONTROLLING AUTHORITY: CASA Sydney Region Operations
&
YMMM/R405B SYDNEY
CONDITIONAL STATUS:
RA3
HELICOPTERS & SEAPLANES
LATERAL LIMITS: 33 49 49S 151 17 05E 33 50 06S 151 16 52E
then along SOUTHERN SHORE HARBOUR 5 to 33 51 09S 151 16 15E
then along SOUTHERN SHORE HARBOUR 4 to 33 52 22S 151 15 26E
then along SOUTHERN SHORE HARBOUR 3 to 33 51 56S 151 15 13E
then along SOUTHERN SHORE HARBOUR 2 to 33 51 33S 151 13 46E
then along SOUTHERN SHORE HARBOUR 1 to 33 51 20S 151 12 28E
33 51 10S 151 12 41E
then along
THE PACIFIC HWY 3 to 33 48 07S 151 10 53E
then along the clockwise arc of a circle of 8.50NM radius centred on
33 56 38S 151 10 57E (SY/DME) to 33 49 49S 151 17 05E
VERTICAL LIMITS:
SFC - 1000
HOURS OF ACTIVITY: HJ
CONTROLLING AUTHORITY: CASA Sydney Region Operations
DAH Effective Date 10 NOV 2016
+++++++++++++++++++++++++++++++++++++++++
THE PACIFIC HWY 3 being the harbour bridge crossing
HJ being between the hours between sunrise and sunset.
If you want an actual link here you go
https://www.airservicesaustralia.com/aip/current/dah/dah.pdf
It is on page 126.
BTW for context here is the airspace designation for pine gap showing how it is restricted in the same manner as
RA3. Part of the Pine gap RA is not even in controlled airspace, however this has no bearing on the restriction in any case.
YMMM/R215 PINE GAP
CONDITIONAL STATUS:
RA3
JOINT DEFENCE FACILITY
LATERAL LIMITS: A Circle of 2.50NM radius centred on
23 48 21S 133 44 10E
VERTICAL LIMITS: SFC - FL180
HOURS OF ACTIVITY: H24
CONTROLLING AUTHORITY: Australian Chief of Security