During this time the country’s head of state was Elizabeth II (represented by a governor-general) from 1966 to 1970, and then a ceremonial president from 1970 to 1980 after Guyana became a republic.

[2] However the powers and influence of the office and individual prime ministers have varied depending on the responsibilities delegated by the president.

Despite it being the practice of almost all political parties or coalitions to designate a presidential and prime ministerial candidate in the event they secure the most votes over any other parties or coalitions in the election, only a presidential candidate is legally required[3] to be designated in advance of the election.

[4] This ensures that the requirements for a person to become president are met in case circumstances result in the prime minister having to accede to the office.

The Prime Minister-designate then takes the following oath of office of the form specified in the Schedule to the Constitution of Guyana: I (name) do hereby solemnly declare that I will bear true faith and allegiance to the People of Guyana and that I will faithfully execute the office of Prime Minister of the Co-operative Republic of Guyana without fear or favour, affection or ill-will and that in the execution of the functions of that office, I will honour, uphold, and preserve the Constitution of the Co-operative Republic of Guyana.The phrase 'so help me God' is not specified in the constitution, but may be added at the end of the oath on the personal discretion of the prime minister.