(a) A first class borough acquires an additional areawide power by transfer of the power by a city or by holding an areawide election on the question.
(b) A second class borough acquires an additional power by transfer of the power by a city or by holding an election on the question. For acquisition of an areawide power, the election shall be held areawide. For acquisition of a nonareawide power, the election shall be held nonareawide.
(c) A third class borough acquires an additional power to exercise in a service area by forming a service area in accordance with AS 29.35.490(b) or (c).