Certain projects are, by their nature, a hybrid of the Social Infrastructure Availability PPP Projects and Linear Infrastructure Availability PPP Projects, for example, rolling stock projects and rail projects including stations, where, the State has a very active role in Operations or there is a third party operator. If a proposed Availability PPP Project is considered to be a hybrid project, guidance must be sought from DTF regarding which of the PV Standard Project Deeds should be used as the base document.