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Yes, but only civil unions issued within Colorado. There is no recognition for the civil unions of other states.
No, civil unions are banned and unrecognized in Utah.
No, civil unions and domestic partnership are not legally defined in North Dakota.
No. Civil unions are not legal in American Samoa.
As of the end of 2009, twenty-four (24) civil unions had been dissolved in New Zealand. Civil Unions began there in 2005.