An urban development enforcement order is a local authority provision obliging a property owner to undertake a building measure. The Federal Building Code (Sections 172, 176-179) lists the following urban-development enforcement orders: preservation order, building order, modernisation and refurbishment order, planting order, and dedevelopment and de-sealing order (formerly demolition order. The prerequisite for issuing orders of this type as instruments to support implementation of a binding land-use plan is that there is an urgent need for such measures on urban development grounds. The measures are to be discussed beforehand with the affected owners, tenants, and leaseholders. They are, however, obliged to tolerate the measures, but legal remedies are available to them which can delay the actual implementation of the order for years. As a rule the local authority will therefore seek a solution acceptable to all sides before they institute administrative execution proceedings.