If a proper contract agreement of two years and designated space are provided through an alternative compliance method, then a shared car service may be accepted as a “carpool or vanpool” substitute. See LEED Interpretation ID#3138, 1/26/2005, in which Reviewers define car share services, and LEED Interpretation ID#3137, 5/24/2004, in which Zipcar is discussed as a carpool substitute for residential projects.