Northern Rhodesia had been detained without trial, following claims that they had planned the indiscriminate killing of Europeans and Asians, and of African opponents, the so-called "murder plot". Shortly afterwards, on 12 March 1959, the governor of Northern Rhodesia also declared a State of emergency there, arrested 45 Zambia African National Congress including Kaunda and banned the party. Kaunda later received a 19-month prison sentence for conspiracy, although no credible evidence of conspiracy was produced. The declaration of States of emergency in both Northern Rhodesia and Nyasaland marked the end of attempts by their nationalist parties to work within the colonial system,
Northern Rhodesia who took their seats together with nine nominated official members. An elector in Northern Rhodesia had to be a United Kingdom citizen, a requirement which practically ruled out Africans who were British Protected Persons. In addition, would-be electors were required to fill in an application form in English, and to have an annual income of at least £200 or occupy immovable property worth £250 (tribal or community occupation of such property was specifically excluded). In 1929, the number of unofficial members was increased to seven. This failed to meet settler aspirations and in 1937 their members demanded parity if numbers