If the owner’s estate is insufficient to enable the owner to grant the right for an indefinite period, the period for which the right subsists shall not extend beyond the date when the owner’s estate determines.

If planning permission for the use of the protected site as a site for caravans has been granted in terms such that it will expire at the end of a specified period, the period for which the right subsists shall not extend beyond the date when the planning permission expires.

If before the end of a period determined by this paragraph there is a change in circumstances which allows a longer period, account shall be taken of that change.