A constitutional referendum was held in Dahomey

Dahomey

Dahomey was a country in west Africa in what is now the Republic of Benin. The Kingdom of Dahomey was a powerful west African state that was founded in the seventeenth century and survived until 1894. From 1894 until 1960 Dahomey was a part of French West Africa. The independent Republic of Dahomey...

 (now Benin

Benin

Benin , officially the Republic of Benin, is a country in West Africa. It borders Togo to the west, Nigeria to the east and Burkina Faso and Niger to the north. Its small southern coastline on the Bight of Benin is where a majority of the population is located...

) on 31 March 1968. As with the 1964 referendum

Dahomeyan constitutional referendum, 1964

A constitutional referendum was held in Dahomey on 5 January 1964. The main issues were changing the system of government to a presidential system, scrapping term limits for the president, and having a unicameral parliament. The referendum passed with 99.86% of voters approving the changes....

, the main issues were changing the system of government to a presidential system

Presidential system

A presidential system is a system of government where an executive branch exists and presides separately from the legislature, to which it is not responsible and which cannot, in normal circumstances, dismiss it....

, scrapping term limits for the president, and having a unicameral parliament

Unicameralism

In government, unicameralism is the practice of having one legislative or parliamentary chamber. Thus, a unicameral parliament or unicameral legislature is a legislature which consists of one chamber or house...

. The referendum passed with 92.2% of voters approving the changes. Turnout was 81.8% of the 1,126,155 registered voters.

Results

Choice	Votes	%
Yes	847,212	92.2
No	71,617	7.8
Invalid/blank votes	3,221
Total	922,050	100
Source: Nohlen et al.