Law no. 2003-699 of 30 July 2003 relative to technological and natural risk prevention and damage reparation specifies the establishment of technological risk prevention plans (PPRT). Their objective is to resolve the difficult urban planning situations inherited from the past and improve the coordination of future urban planning. PPRTs relate to “high-risk” SEVESO sites known as AS.
To preserve the future, the PPRT can, within the scope of risk exposure, outline the areas in which new constructions or extensions will be prohibited or subject to compliance with requirements relative to construction or use.
The operator of a SEVESO AS facility must implement all safety measures to attain a risk level as low as possible, taking into account current knowledge and practices as well as the vulnerability of the facility’s environment. The reduction of risks at source is the utmost priority. The order of 29 September 2005 (published on 7 October 2005) amending the order of 10 May 2000, known as “SEVESO” order and Circular of 29 September 2005, make it possible to assess the level of risk reduction in facilities.
If, having applied the best economically acceptable available practices and technology, these measures are insufficient with regard to the vulnerability of surrounding populations, the PPRT can, in order to resolve the situations inherited from the past, within the scope of risk exposure  and in the areas regulated for future urban development, institute an urban pre-emption right, mark the boundaries of the areas in which the municipality will be entitled to institute a right of abandonment , and other sectors where home expropriations may be declared in the public interest. These land-related measures will only be selected if no easier measures can be implemented with regard to existing constructions or can be prescribed to reduce population vulnerability.
The funding of expropriation and abandonment measures will be subject to three-party agreements between the industrial companies generating the risk, the local authorities and the State. Additional measures for risk reduction at source (exceeding the best economically acceptable available practices and technology, or compulsory regulatory measures) can also be financed by the three parties, provided they result in a decrease in the overall cost of the PPRT to be taken into account in the agreements.
Under the authority of the Prefect, the service of the Inspectorate of classified installations (DRIRE or STIIIC) and equipment services (DDE) are the main State entities involved in the establishment of the PPRT.
Decree no. 2005-1130 of 7 September 2005 defines PPRT procedures and implementation schedule. The Circular of 3 October 2005 relative to the implementation of PPRTs specifies the definition of the scope necessary for the specification of the plan. The PPRT drafting manual (version 2) is available on the Ministry’s website.
PPRTs are established in 4 successive phases, the first of which involving 124 PPRTs was launched at the end of 2005. In total, 421 PPRT relating to 670 industrial facilities should be established.
PPRTs are long-term solutions: the implementation of their measures could take up to 30 years. 2Regulatory references2 Article 3, 5° of Decree no. 1133 of 21 September 1977 (OJ of 8 October 1977, amended by decree 2005-1170 of 13 September 2005).
Articles R515-39 to R515-50 of the environmental code relative to technological risk prevention plans. (Application of articles L.515-15 to L.515-24 of the environmental code.)
Circular of 3 October 2005 relative to the implementation of technological risk prevention plans
Decree 2006-55 of 17 January 2006 (OJ of 19 January 2006) on the prevention of technological risks and personnel safety, amending the Labour code.
 Approved scope of the PPRT
 The institution of the right of abandonment allows the owner to choose the transfer date of their property to the municipality.