Botswana

Whereas every person in Botswana is entitled to the fundamental rights and freedoms of the individual, that is to say, the right, whatever his or her race, place of origin, political opinions, colour, creed or sex, but subject to respect for the rights and freedoms of others and for the public interest to each and all of the following, namely-
…
(b) freedom of conscience, of expression and of assembly and association;
… (Sec. 3)

(1) Except with his or her own consent, no person shall be hindered in the enjoyment of his or her freedom of assembly and association, that is to say, his or her right to assemble freely and associate with other persons and in particular to form or belong to trade unions or other associations for the protection of his or her interests.
… (Sec. 13)

(1) A person who-
(a) is a citizen of Botswana or of any other country to which this section is applied by Parliament;
(b) has attained the age of 18 years; and
(c) has either resided in Botswana for a continuous period of at least 12 months immediately preceding the date on which he or she applies for registration as a voter or was born in Botswana and is domiciled in Botswana on the date on which he or she applies for registration as a voter, shall, unless he or she is disqualified for registration as a voter under any law, be entitled, upon his or her making application in that behalf at such time and in such manner as may be prescribed by any law, to be registered as a voter for the purposes of elections of Elected Members of the National Assembly, and no other person may be so registered.
… (Sec. 67)