The Union Jack, or Union Flag, is the de facto national flag of the United Kingdom. Although no law has been passed making the Union Jack the official national flag of the United Kingdom, it has effectively become such through precedent. It is sometimes asserted that the term Union Jack properly refers only to naval usage, but this assertion was dismissed by the Flag Institute in 2013 following historical investigations. The flag has official status in Canada, by parliamentary resolution, where it is known as the Royal Union Flag. It is the national flag of all British overseas territories, being localities within the British state, or realm, although local flags have also been authorised for most, usually comprising the blue or red ensign with the Union Flag in the canton and defaced with the distinguishing arms of the territory. These may be flown in place of, or along with (but taking precedence after) the national flag. Governors of British Overseas Territories have their own personal flags, which are the Union Flag with the distinguishing arms of the colony at the centre. The Union Flag also appears in the canton (upper flagpole-side quarter) of the flags of several nations and territories that are former British possessions or dominions, as well as in the flag of the US State of Hawaii, which has no such connection. 4K Resolution.