word | | Constitution |
| Maastricht | European Union | ... Energy Community (Euratom) in 1957; the Single European Act in 1986; the Treaty on European Union (Maastricht) in 1992; the Treaty of Amsterdam in 1997; and the Treaty of Nice in 2003 ... |
| Maastricht | France | ... note: amended concerning election of president in 1962; amended to comply with provisions of 1992 EC Maastricht Treaty, 1997 Amsterdam Treaty, 2003 Treaty of Nice; amended to tighten immigration laws in 1993 ... |
| Macau | Macau | Basic Law, approved on 31 March 1993 by China's National People's Congress, is Macau's "mini-constitution" |
| Man | Isle of Man | unwritten; note - The Isle of Man Constitution Act of 1961 does not embody the unwritten Manx Constitution |
| mandate | European Union | ... to the ratification process; in June 2007, the European Council agreed on a clear and concise mandate for an Intergovernmental Conference to form a political agreement and put it into legal form ... |
| mandatory | Fiji | enacted on 25 July 1997 to encourage multiculturalism and make multiparty government mandatory; effective 28 July 1998 |
| MANDELA | South Africa | ... 1996; this new constitution was certified by the Constitutional Court on 4 December 1996, was signed by then President MANDELA on 10 December 1996, and entered into effect on 4 February 1997 |
| Manx | Isle of Man | unwritten; note - The Isle of Man Constitution Act of 1961 does not embody the unwritten Manx Constitution |
| March | Andorra | Andorra's first written constitution was drafted in 1991, approved by referendum 14 March 1993, effective 28 April 1993 |
| March | Bangladesh | 4 November 1972, effective 16 December 1972; suspended following coup of 24 March 1982, restored 10 November 1986; amended many times |
| March | Belarus | 15 March 1994; revised by national referendum of 24 November 1996 giving the presidency greatly expanded powers and became effective 27 November 1996; revised again 17 October 2004 removing presidential term limits |
| March | Bhutan | none; note - a draft constitution was unveiled in March 2005 and is expected to be adopted by the new National Assembly in 2008 |
| March | Botswana | March 1965, effective 30 September 1966 |
| March | Canada | ... decisions, and traditions; the written part of the constitution consists of the Constitution Act of 29 March 1867, which created a federation of four provinces, and the Constitution Act of 17 April ... |
| March | Chad | passed by referendum 31 March 1996; a June 2005 referendum removed constitutional term limits |
| March | Chile | 11 September 1980, effective 11 March 1981; amended 1989, 1991, 1997, 1999, 2000, 2003, and 2005 |
| March | Egypt | 11 September 1971; amended 22 May 1980, 25 May 2005, and 26 March 2007 |
| March | Finland | 1 March 2000 |
| March | Gabon | adopted 14 March 1991 |
| March | Greece | 11 June 1975; amended March 1986 and April 2001 |
| March | Haiti | approved March 1987; suspended June 1988 with most articles reinstated March 1989; constitutional government ousted in a military coup in September 1991, although in October 1991, military government claimed to be observing ... |
| March | Hong Kong | Basic Law, approved in March 1990 by China's National People's Congress, is Hong Kong's "mini-constitution" |
| March | Libya | ... Libyan government, the Revolutionary Command Council replaced the existing constitution with the Constitutional Proclamation in December 1969; in March 1977, Libya adopted the Declaration of the Establishment of the People's Authority |
| March | Macau | Basic Law, approved on 31 March 1993 by China's National People's Congress, is Macau's "mini-constitution" |
| March | Mauritius | 12 March 1968; amended 12 March 1992 |
| March | Morocco | 10 March 1972; revised 4 September 1992, amended (to create bicameral legislature) September 1996 |
| March | Namibia | ratified 9 February 1990, effective 12 March 1990 |