Section 27. The authority shall submit to the metropolitan highway system advisory board, pursuant to section twenty-eight, all contracts, plans, agreements and memoranda of understanding relative to land use plans, air rights, zoning restrictions and environmental impacts associated with the development on any land owned by the authority within the metropolitan highway system. The authority shall not proceed with the final execution of such contracts, plans, agreements and memoranda of understanding prior to the review of the advisory board pursuant to said section twenty-eight.