Upon approval of authorizing resolutions by the board of trustees and the board of commissioners of the affected county, the territorial jurisdiction and service area of an authority may be expanded to include a whole county within this State that is contiguous to the then existing territorial jurisdiction of the authority. Each of the authorizing resolutions must receive an affirmative vote equal to at least seventy-five percent (75%) of the membership of the applicable board. The authorizing resolutions shall contain provisions with respect to the following:
(1) The date on which the territorial jurisdiction is to be expanded to include the county.
(2) The extent to which the composition of the board of trustees may be amended, if at all, due to the addition of the county to the territorial jurisdiction of the authority. The authorizing resolutions shall not eliminate or amend the requirements with respect to appointments to the board of trustees that are provided in G.S. 160A-905. Subsections (b) through (i) of G.S. 160A-905 shall apply to any additional appointments to the board of trustees.
(3) Financial, legal, or operational commitments with respect to the county that is to be added to the territorial jurisdiction of the authority.
(4) Any other matter determined to be relevant by the board of trustees and the board of commissioners of the affected county.