(a) This section must be used to determine whether a combination of solar energy generating systems meets the definition of large electric power generating plant and is subject to the commission's siting authority jurisdiction under this chapter. The alternating current nameplate capacity of one solar energy generating system must be combined with the alternating current nameplate capacity of any other solar energy generating system that:
(1) is constructed within the same 12-month period as the solar energy generating system; and
(2) exhibits characteristics of being a single development, including but not limited to ownership structure, an umbrella sales arrangement, shared interconnection, revenue sharing arrangements, and common debt or equity financing.
(b) The commissioner of commerce shall provide forms and assistance for applicants to make a request for a size determination. Upon written request of an applicant, the commissioner shall provide a written size determination within 30 days of receipt of the request and of any information requested by the commissioner. In the case of a dispute, the chair of the Public Utilities Commission shall make the final size determination.