Any additional lease-purchase agreement entered into by the director pursuant to the provisions of this part 7 may contain such terms, provisions, and conditions as the director may deem appropriate. Such provisions may allow the state to receive fee title to the real and personal property which is the subject of such additional lease-purchase agreement on or prior to the expiration of the entire term of the agreement, including all optional renewal terms. Any additional lease-purchase agreement entered into pursuant to the provisions of this part 7 may further provide for the issuance, distribution, and sale of instruments evidencing rights to receive rentals and other payments made and to be made under such additional lease-purchase agreement, but only if and after a court of competent jurisdiction renders a final decision as to the constitutionality of the issuance of certificates of participation or other instruments evidencing the commitment of a district to make payments in subsequent fiscal years of moneys due under an installment purchase agreement for the purchase of real or personal property which requires payments during more than one fiscal year, or any agreement for the lease or rental of real or personal property which requires payments during more than one fiscal year and under which such district is entitled to receive title to the property at the end of the term for nominal or no additional consideration. Such instruments shall not be notes, bonds, or any other evidence of indebtedness of the state of Colorado within the meaning of any provision of the Colorado constitution or the laws of the state of Colorado concerning or limiting the creation of indebtedness by the state of Colorado. Interest paid under any additional lease-purchase agreement entered into pursuant to this part 7, including interest represented by such instruments, shall be exempt from Colorado income tax. Any such additional lease-purchase agreements shall provide an option for the state to purchase the property which is the subject of the lease prior to the termination of such additional lease-purchase agreement. In no event shall any individual representing a firm which was the successful bidder for a proposed financial services contract, which contract related to a master leasing program, prior to June 20, 1987, be allowed to become the underwriter or financial advisor for any master leasing agreement entered into by the director prior to June 30, 1988, pursuant to the provisions of this part 7.