A person shall be qualified to be a candidate for election as President VicePresident of the Republic if at the time of election such person-
(a) is a citizen of the Republic;
(b) has attained the age of thirtyfive years;
(c) has not been, on or after the date of the coming into operation of this] Constitution, convicted of an offence involving dishonesty or moral turpitude or is not under any disqualification imposed by a competent court for any electoral offence;
(d) is not suffering from a mental disease incapacitating such person from acting as President or VicePresident of the Republic.