2 – The CNPD must be consulted on any legal provisions and on legal instruments in preparation in Community or international institutions relating to the processing of personal data. (a) investigative powers, and may have access to data undergoing processing and powers to collect all the information necessary for the performance of its supervisory duties; (b) powers of authority, particularly those of ordering the blocking, erasure or destruction of data, or imposing a temporary or permanent ban on the processing of personal data, even if included in open data processing networks from servers situated on Portuguese territory; (c) the power to deliver opinions before processing is carried out and to ensure their publication. 4 – In the event of repeated failure to comply with legal provisions relating to personal data the CNPD may warn or publicly censure the processor, and in accordance with its duties may raise the matter with the Assembleia da Rep�blica, the Government or other bodies or authorities. 5 – The CNPD is authorised to engage in legal proceedings where the provisions in this Act have been violated and must report to the Public Prosecution Service any criminal offences it becomes aware of in exercising and arising out of its functions, and shall take the necessary and urgent precautionary measures to provide the evidence. 6 – The CNPD is represented at law by the Public Prosecution Service and is exempt from costs in the proceedings in which it is involved. 2 – In exercising its responsibilities to issue directives or assess codes of conduct the CNPD must promote consideration of the views of the associations defending the interests concerned. 3 – In exercising its functions the CNPD shall lay down obligatory decisions against which challenges or appeals may be lodged with the Tribunal Central Administrativo [Central Administrative Court]. 4 – The CNPD may suggest to the Assembleia de Rep�blica the measures deemed useful for pursuing its duties and exercising its responsibilities. 1 - The public and private bodies shall cooperate with the CNPD by providing it with all the information requested in carrying out its responsibilities. 2 – The duty to cooperate shall be ensured in particular when in order to exercise its functions in full the CNPD has to examine the computer system and personal data filing systems, and all documentation relating to the processing and transmission of personal data. 13/20