| State | Australia |
| Treaty | Treaty on the Non-Proliferation of Nuclear Weapons (NPT) |
| Action Type | Ratification |
| Depositary | Government of the United States of America |
| Date | 23 January 1973 |
| Note |
At the time of its signature of the Treaty at Washington, Australia made a declaration which was not intended to have any further application after Australia’s ratification of the Treaty on January 23, 1973. |
| Other Actions | Ratification on deposit with London — 23 January 1973 Signature on deposit with London — 27 February 1970 Ratification on deposit with Moscow — 23 January 1973 Signature on deposit with Moscow — 27 February 1970 Signature on deposit with Washington — 27 February 1970 |