Solomon Islands is one of fifteen independent nations, known as Commonwealth realms, which shares its sovereign with other realms in the
Commonwealth of Nations, with the monarch's relationship with Solomon Islands completely independent from his position as monarch of any other realm. Despite sharing the same person as their respective monarch, each of the Commonwealth realms — including Solomon Islands — is sovereign and independent of the others. The Solomon Island monarch is represented by a
viceroy—the governor-general of Solomon Islands—in the country. Since the independence of Solomon Islands in 1978, the pan-national Crown has had both a shared and a separate character and the sovereign's role as monarch of Solomon Islands is distinct to his or her position as monarch of any other realm, including the United Kingdom. This division is illustrated in a number of ways: The sovereign, for example, holds
a unique Solomon Island title and, when he is acting in public specifically as a representative of Solomon Islands, he uses, where possible, national symbols of Solomon Islands, including the country's
national flag, unique royal symbols, and the like. Also, only Solomon Island
government ministers can advise the sovereign on matters of Solomon Islands.
Title Although Queen Elizabeth II became head of state of Solomon Islands upon independence in 1978, it was not until 2013 that the National Parliament passed the
Royal Style and Titles Act 2013, which legally granted the monarch separate style and titles in relation to Solomon Islands. Upon the commencement of the act, the Queen's official style and titles became:
Elizabeth the Second, by the Grace of God, Queen of Solomon Islands and Her other Realms and Territories, Head of the Commonwealth. These new style and titles were already in non-statutory use since 1988, when it was included in the Ministry of Foreign Affairs and External Trade Manual. Since the accession of King Charles III, the monarch's title is:
Charles the Third, by the Grace of God, King of Solomon Islands and His other Realms and Territories, Head of the Commonwealth. When Queen Elizabeth II first visited Solomon Islands in 1974, she was given the title
Fau Ni Qweraasi, meaning "a people’s protector", by chief Simeon Kariqwongi of Star Harbour in south-east
Makira.
Oath of allegiance As the embodiment of the state, the monarch is the locus of oaths of Allegiance. This is done in
reciprocation to the sovereign's
Coronation Oath, wherein they promise to govern the peoples of their realms, "according to their respective laws and customs". The oath of allegiance in Solomon Islands is:
Succession , is the current heir apparent to the throne of Solomon Islands Like some realms, Solomon Islands defers to United Kingdom law to determine the line of succession. Succession is by
absolute primogeniture governed by the provisions of the
Succession to the Crown Act 2013, as well as the
Act of Settlement, 1701, and the
Bill of Rights, 1689. This legislation limits the succession to the natural (i.e. non-
adopted), legitimate descendants of
Sophia, Electress of Hanover, and stipulates that the monarch cannot be a
Roman Catholic, and must be in communion with the
Church of England upon ascending the throne. Though these constitutional laws, as they apply to Solomon Islands, still lie within the control of the
British Parliament, both the United Kingdom and Solomon Islands cannot change the rules of succession without the unanimous consent of the other realms, unless explicitly leaving the shared monarchy relationship; a situation that applies identically in all the other realms, and which has been likened to a
treaty amongst these countries. Upon a
demise of the Crown (the death or abdication of a sovereign), it is customary for the accession of the new monarch to be publicly proclaimed by the governor-general in the capital,
Honiara, after the accession. Regardless of any proclamations, the late sovereign's heir immediately and automatically succeeds, without any need for confirmation or further ceremony. An appropriate period of mourning also follows, during which flags across the country are flown at half-mast to honour the late monarch. A day of mourning to commemorate the late monarch is likely to be a public holiday. ==Constitutional role and royal prerogative==