The next zone, the primary dune, is absolutely different: it is absolutely intolerant. It cannot stand any trampling. It must be prohibited to use. If it is to be crossed, and crossed it must be to reach the beach, then this must be accomplished by bridges. Moreover, if the dune is to offer defense against storms and floods, then it must not be breached. As a consequence no development should be permitted on the primary dune, no walking should be allowed and it should not be breached at any point.