Without prejudice to other Community legislation, in paticular that on market access, each Member State shall retain the right, strictly for reasons other than safety during transport, such as reasons of national security or environmental protection, to regulate or prohibit the transport of certain dangerous goods within its territory.

Any rules imposed by a Member State on vehicles performing internaitonal transport through its territory and authorized F1by the special provision referred to in paragraph 2 of Annex C shall be limited in scope locally, shall apply to both national and international transport and may not result in any discrimination.

If a Member State considers that the safety provisions applicable have been found to be insufficient, on the occasion of an accident or an incident, to limit the hazards involved in transport and if there is an urgent need to take action, it shall notify the Commission, at the planning stage, of the measures which it proposes to take. Acting in accordance with the procedure laid down in Article 9, the Commission shall decide whether the implementation of those measures should be authorized and determine their duration.

The Member States may maintain any national provisions applicable on 31 December 1996 with regard to:

• the transport of Class 1.1 substances,

• the transport of toxic, unstable and/or flammable gases of Class 2,

• the transport of substances containing dioxins or furans,

• the transport in tanks or tank-containers of more than 3 000 litres of liquids of Classes 3, 4.2, 4.3, 5.1, 6.1 or 8 which do not appear under (b) or (c) in these classes.

Such provisions may concern only:

• the prohibition of such transport operations by road where it is possible for them to be carried out by rail or by inland waterway,

• a requirement to follow certain preferred routes,

• any other provisions concerning the packaging of substances containing dioxins or furans.

These provisions may not be extended or made more stringent. The Member States shall communicate these national provisions to the Commission, which shall inform the other Member States accordingly.

Each Member State may authorize the transport by road within its territory of dangerous goods classified, packaged and labelled in accordance with the international requirements for maritime or air transport whenever the transport operation involves a sea or air voyage.

Any provisions in Annexes A and B concerning the use of languages in relevant marking or documentation shall not apply to transport operations confined to the territory of a single Member State. Member States may authorize the use of languages other than those provided for in the Annexes for transport operations performed within their territories.

Within its territory each Member State may authorise the use of vehicles constructed before 1 January 1997 which do not comply with this Directive, but were constructed in accordance with national requirements in force on 31 December 1996 provided that such vehicles are maintained to the required safety levels.

Tanks and vehicles constructed on or after 1 January 1997 which do not comply with Annex B but were constructed in accordance with the requirements of this Directive that were applicable on the date of their construction may continue to be used for national transport until a date determined in accordance with the procedure laid down in Article 9.

F3Each Member State may maintain its national provisions in force on 31 December 1996 relating to the construction, use and conditions of carriage of new pressure drums and cylinder racks within the meaning of the special provision referred to in paragraph 4 of Annex C and new tanks which do not comply with Annexes A and B, until references to standards for the construction and use of tanks, pressure drums and cylinder racks with the same binding force as the provisions of this Directive are added to Annexes A and B and in any event no later than 30 June 2003. Pressure drums, cylinder racks and tanks constructed before 1 July 2003 and other receptacles constructed before 1 July 2001 and maintained to the required safety levels may continue to be used under the original conditions.

These dates shall be put back for receptacles and tanks for which there are no detailed technical requirements or for which no sufficient references to the appropriate European standards have been added to Annexes A and B.

The receptacles and tanks referred to in the second subparagraph and the latest date for the application of this Directive as regards those receptacles and tanks shall be determined in accordance with the procedure laid down in Article 9.

Each Member State may maintain national provisions other than those set out in Annexes A and B with regard to the reference temperature for the transport within its territory of liquified gases or mixtures of liquified gases until provisions relating to appropriate reference temperatures for designated climatic areas are incorporated into European standards and references to those standards are added to Annexes A and B.

Each Member State may allow the use, for transport within its territory, of packagings constructed but not certified in accordance with the ADR before 1 January 1997 provided that such packaging shows the date of manufacture and is capable of passing the tests laid down in national legislation in force on 31 December 1996 and provided that all such packagings are maintained to the relevant safety levels (including testing and inspection where required), in accordance with the following scheme: intermediate metal bulk containers and metal drums exceeding 50 litres in capacity, for up to 15 years after their date of manufacture; other metal packagings and all plastics packagings, for up to five years after their X1date of manufacture but not after 31 December 1998F2, except that in the case of plastic packaging not exceeding twenty litres in capacity, that date may be put back to 30 June 2001 at the latest.

Each Member State may allow the transport within its territory of certain dangerous goods packaged before 1 January 1997 until 31 December 1998, provided that the goods are classified, packaged and labelled in accordance with the requirements of national legislation in force before 1 January 1997.

Each Member State may maintain provisions of national legislation in force on 31 December 1996 relating to the display of an emergency action code in place of the hazard identification number provided for in Annex B for transport operations performed within its territory by vehicles registered within that territory.

Provided they give the Commission advance notification no later than 31 December 2002 or until two years after the last date of application of amended versions of Annexes A and B to this Directive, Member States may adopt provisions that are less stringent than those in the Annexes for the transport within their territory only of small quantities of certain dangerous goods, with the exception of substances having a medium or high level of radioactivity.

Provided they give the Commission advance notification no later than 31 December 2002 or until two years after the last date of application of amended versions of Annexes A and B to this Directive, Member States may adopt provisions different from those contained in the Annexes in respect of local transport limited to their territory.

The derogations provided for in the first and second subparagraphs shall be applied without discrimination.

Notwithstanding the above, Member States may, provided they give the Commission advance notification, at any time adopt provisions similar to provisions adopted by other Member States with reference to this paragraph.

The Commission shall examine whether the conditions laid down in this paragraph have been met and shall decide, in accordance with the procedure laid down in Article 9, whether the Member States concerned may adopt these derogations.

Provided that safety is not compromised, the Member States may grant temporary derogations from Annexes A and B for the purpose of carrying out within their territories the trials necessary before the amendment of those Annexes to adapt them to technological and industrial developments. The Commission shall be informed thereof and shall inform the other Member States accordingly.

A temporaty derogation agreed on between Member States' competent authorities on the basis F1of the special provisions referred to in paragraph 5 of Annex C shall take the form of a multilateral agreement proposed to all Member States' competent authorities by the authority taking the initiative in respect of the agreement. The Commission shall be informed accordingly.

Any derogation such as referred to in the first and second subparagraphs shall be applied without discrimination on grounds of the nationality or the place of establishment of the consignor, haulier or consignee; they may last for up to five years and shall not be renewable.

The Member States may issue authorisations, valid for their territory only, to carry out ad hoc transport operations of dangerous goods which are either prohibited by Annex A or B or are performed under conditions different from those laid down in those Annexes, on condition that these ad hoc transport operations are clearly defined and limited in time.

Without prejudice to paragraph 2, each Member State may until 31 December 1998 at the latest apply existing agreements with other Member States that comply with the ADR, without discrimination on grounds of the nationality or the place of establishment of the consignor, haulier or consignee. Any other derogation authorized by F1the special provisions referred to in paragraph 5 of Annex C shall comply with paragraph 10.