word | | Constitution |
| French | Saint Martin | 4 October 1958 (French Constitution) |
| French | Saint Pierre and Miquelon | 4 October 1958 (French Constitution) |
| French | Wallis and Futuna | 4 October 1958 (French Constitution) |
| fully | Eritrea | adopted 23 May 1997, but has not yet been fully implemented |
| fully | Northern Mariana Islands | Constitution of the Commonwealth of the Northern Mariana Islands effective 1 January 1978; Covenant Agreement fully effective 4 November 1986 |
| Functioning | European Union | ... further that the EU is "founded on the present Treaty and on the Treaty on the Functioning of the European Union (hereinafter referred to as 'the Treaties')," both possessing the same legal ... |
| functions | Akrotiri | Sovereign Base Areas of Akrotiri and Dhekelia Order in Council 1960, effective 16 August 1960, functions as a basic legal document |
| functions | Dhekelia | Sovereign Base Areas of Akrotiri and Dhekelia Order in Council 1960, effective 16 August 1960, functions as a basic legal document |
| functions | Israel | no formal constitution; some of the functions of a constitution are filled by the Declaration of Establishment (1948), the Basic Laws of the parliament (Knesset), and the Israeli citizenship law; note - since ... |
| functions | San Marino | 8 October 1600; electoral law of 1926 serves some of the functions of a constitution |
| Fundamental | European Union | ... possessing the same legal value; Article 6 of the TEU provides that a separately adopted Charter of Fundamental Rights of the European Union "shall have the same legal value as the Treaties |
| Fundamental | Holy See (Vatican City) | Fundamental Law promulgated by Pope JOHN PAUL II 26 November 2000, effective 22 February 2001 (replaced the first Fundamental Law of 1929) |
| Fundamentale | Guinea | 7 May 2010 (Loi Fundamentale) |