The Administrator shall endeavor to enter into an agreement with the federal government concerning abandoned property in federal custody. The agreement shall provide: Unless federal law provides otherwise, that tangible abandoned property in federal custody that was initially acquired in this State shall be delivered to the Administrator; That if the last known address of any owner of intangible abandoned property in federal custody is in this State: The situs of the abandoned property is in this State, and the abandoned property shall be delivered to the Administrator; and That the address of any other owner of the abandoned property in federal custody is determined by federal law; For payment of the State’s proportionate share of costs incurred by the federal government in: Investigating records of abandoned property; Reporting information about abandoned property to the Administrator; and Delivering the abandoned property to the Administrator; The manner and times of payment, including a provision that payments may be made at stated times over a period of years; That this State indemnifies the federal government against any claim made as a result of the delivery of abandoned property to this State under the agreement; and That the Attorney General of this State shall intervene in any action or proceeding brought against the federal government as a result of action taken in accordance with the agreement.