is a term used in the United Kingdom
for a local government
forms a single tier of administration. Traditionally there would be a two-tier arrangement where
had a council and contained multiple districts
with councils of their own.
The area administered by a unitary authority is called a "unitary authority area" or sometimes
a "unitary district".
Scotland and Wales consistently use unitary authorities. They have been becoming common in England
since the 1990s. However the two-tier arrangement (increasing to three-tiers, for the remaining counties)
has remained in a different form due to the introduction of a regional level of administration.
Listings of unitary authorities in England can be found by region.
A unitary authority in New Zealand refers to a territorial authority (district or city) which does not have
an encompassing regional council. They are listed under Region (New Zealand).
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