All costs and expenses which a participating public agency of this state incurs in connection with the receiving, obtaining, providing or furnishing of services, personnel, facilities, equipment, other property or resources, or the engaging in or performance of functions or activities under an interlocal agreement shall be incurred, appropriated, raised, financed and audited in the same manner and subject to the same statutory provisions and restrictions as though such participating public agency were receiving, obtaining or providing the same or substantially similar services, personnel, facilities, equipment, other property or resources, or engaging in or performing the same or substantially similar functions or activities without an interlocal agreement.