Electoral system for the president

30: There shall be a President of the Republic of Botswana who shall be the Head of State. 

32(1): Whenever Parliament is dissolved, an election shall be held to the office of President in such manner as is prescribed by this section and, subject thereto, by or under an Act of Parliament. 

32(3): (a) a person nominated as a Parliamentary candidate may, at the time of his or her nomination and subject to the provisions of paragraph (b), declare ... which of the candidates in the election of President he or she supports, but the nomination of a Parliamentary candidate shall be valid notwithstanding that the nomination paper does not contain such a declaration; (c) where the Parliamentary election is contested in any constituency, a poll shall be taken in that constituency at which the votes shall be given by ballot, and for the purposes of that poll any Parliamentary candidate who declared support in accordance with paragraph (a) for a particular Presidential candidate shall use the same voting colour and symbol ... (d) the returning officer shall declare to be elected as President any candidate for whom support has been declared in accordance with paragraph (a) above by not less than such number of persons elected as Members of the National Assembly in the Parliamentary elections as corresponds to more than half the total number of seats for Elected Members in the Assembly, and if there is no such person the returning officer shall declare that no candidate has been elected. 

32(11): 'Parliamentary candidate' means a candidate in the Parliamentary election; 'the Parliamentary election' means the general election to elect those Members of the National Assembly who are referred to in section 58(2)(a) of this Constitution ... 'Presidential candidate' means a candidate for the office of President.