Tanzania, United Republic of

(1) Every citizen of the Untied Republic who has attained the age of eighteen years is entitled to vote in any election held in Tanzania. This right shall be exercised in accordance with the sub article (2), and of the other provisions of this Constitution and the law for the time being in force in Tanzania in relation to public elections.
(2) Parliament may enact a law imposing conditions restricting a citizen from exercising the right to vote by reason of any of the following grounds:
(a) being a citizen of another state;
(b) being mentally infirm;
(c) being convicted of certain specified criminal offences; or
(d) omission or failure to prove or to produce evidence as to age, citizenship or registration as a voter.
Except for these grounds no other grounds shall disqualify a citizen from exercising the right to vote.
… (Art. 5)

(1) Every person has a freedom, to freely and peaceably assemble, associate and cooperate with other persons, and for that purpose, express views publicly and to form and join with associations or organizations formed for purposes of preserving or furthering his beliefs or interests or any other interests.
… (Art. 20)

(1) Subject to the provisions of Article 39, 47 and 67 of this Constitution and of the laws of the land in connection with the conditions for electing and being elected or for appointing and being appointed to take part in matters related to governance of the country, every citizen of the United Republic is entitled to take part in matters pertaining to the governance of the country, either directly or through representatives freely elected by the people, in conformity with the procedures laid down by, or in accordance with, the law.
(2) Every citizen has the right and the freedom to participate fully in the process leading to the decision on matters affecting him, his well-being or the nation. (Art. 21)