Nigeria was one of the
realms of the
Commonwealth of Nations that shared the same person as
Sovereign and head of state. Effective with the Nigeria Independence Act 1960, no British government minister could advise the Sovereign on any matters pertaining to Nigeria, meaning that on all matters of Nigeria, the monarch was advised solely by Nigerian ministers. All Nigerian bills required
Royal Assent. The monarch was represented in the Federation by the
Governor-General of Nigeria, who was appointed by the monarch on the advice of the Nigerian Prime Minister.
Executive and legislature The Government of Nigeria was officially known as ''
Her Majesty's Government''. All executive powers of Nigeria rested with the sovereign. All laws in Nigeria were enacted only with the granting of
Royal Assent, done by the Governor-General on behalf of the Sovereign. The Governor-General could reserve a bill "for the Queen's pleasure"; that is withhold his consent to the bill and present it to the sovereign for her personal decision; or he could veto it completely by withholding his assent therefrom. The Governor-General was also responsible for summoning,
proroguing, and
dissolving Parliament. The Governor-General had the power to choose and appoint the Council of Ministers and could dismiss them under his discretion. All Nigerian ministers held office at the pleasure of the Governor-General.
Foreign affairs The Royal Prerogative also extended to foreign affairs: the sovereign or the governor-general conducted
treaties, alliances and international agreements on the advice of the Nigerian Cabinet. Nigerian representatives abroad were accredited to foreign countries by the monarch in her capacity as Queen of Nigeria. The
letters of credence were formally issued by the monarch.
Courts Within the Commonwealth realms, the sovereign is responsible for rendering justice for all her subjects, and is thus traditionally deemed the
fount of justice. In Nigeria, criminal offences were legally deemed to be offences against the sovereign and proceedings for
indictable offences were brought in the sovereign's name in the form of
The Queen versus [Name]. Hence, the common law held that the sovereign "can do no wrong"; the
monarch cannot be prosecuted in her own courts for criminal offences. The highest court of appeal for Nigeria was the
Judicial Committee of the Privy Council, and criminal prosecution was instituted in the monarch's name. ==Federal and provincial aspects==