Tonga: Polity Style: 1875-2024 |
| 4 Nov 1875 |
constituted as kingdom when the Constitution is granted by the King 4 Nov 1875 [Tonga Law, Appendix, i-xix] |
| 4 Nov 1875 - |
Puleʻanga Fakatuʻi ʻo Tonga = Kingdom of Tonga [1] |
| 18 May 1900 |
Treaty of Friendship with the United Kingdom is signed, placing Tonga under protectorate (effective from the date of signature 18 May 1900 as provided by Art. VII; ratifications exchanged at Nukuʻalofa 16 Feb 1901) [British and Foreign State Papers, 107:521; Tonga Law, Appendix, xxi-xxii] |
| 4 Jun 1970 |
ceased to be a protected state and became an independent state in accordance with Art. 1 (1) of the Tonga Act, 1970 (received Royal Assent 15 May 1970) [2] |
