Except as provided in paragraph (2) of this subsection, an agreement entered under § 19–602(b) of this subtitle may include the provisions that the counties adopt in the authorizing resolution. An agreement may not expire before the redemption or maturity of the notes issued under the agreement. By agreement, two or more counties may establish a trust or similar arrangement authorized to sell notes on the same terms and in the same manner as counties may sell notes under this part and loan the proceeds of the notes to the counties.