(b) If an intergovernmental agreement entered into in accordance with the provisions of section three of this article, and if any contract for the performance of a service, activity or undertaking entered into in accordance with the provisions of section seven of this article, creates a financial obligation for a public agency, the agreement or contract is one fiscal year, but the same may be annually renewed each fiscal year: Provided, That any such agreement or contract may be for such period in excess of one fiscal year as is specified in the agreement or contract, if such agreement or contract is ratified by a majority of the legal votes cast by the qualified voters of the several jurisdictions represented by the contracting parties voting separately at a regular or special election.