6.  The applicant was born in 1970 and lives in Houten.
7.  The applicant was employed by the AIVD as an audio editor and interpreter. In this capacity he had access to classified information (gerubriceerde informatie), which he was under a duty not to divulge to persons not authorised to have knowledge of it.
8.  The suspicion arose that the applicant had forwarded copies of classified documents to persons outside the service, including in some cases persons who were under covert investigation by the AIVD in connection with possible terrorist activity.
9.  On 30 September 2004 the applicant was arrested. He was charged with divulging State secret information to persons not authorised to take cognisance of it and taken into detention on remand (voorlopige hechtenis).
10.   The AIVD advised the applicant in writing that he was still under an obligation of secrecy. Consequently it would be constitutive of a further criminal offence if he were to discuss matters covered by his duty of secrecy with anyone including his counsel.
11.  The applicant’s counsel were also warned that they might be prosecuted should they divulge any State secret information to third parties.
12.  The trial opened before the Rotterdam Regional Court (rechtbank) on 10 January 2005. It was adjourned several times.
13.  The applicant’s counsel protested against the restrictions affecting communication between themselves and the applicant, which in their submission undermined the effectiveness of the defence. They also asked for certain documents to be added to complete the file: these included the internal AIVD report that was the basis of the prosecution, which was absent from the file altogether, and the documents which had supposedly been leaked, which had been added to the case file in redacted form with parts blacked out. They further repeated a request, made earlier in writing, for the applicant to be released unconditionally from his duty of secrecy in order to conduct his defence (vrijwaring).
14.  The public prosecutor (officier van justitie) announced that some but not all of the documents requested by the defence would be added to the file but refused to release the applicant from his duty of secrecy unconditionally.
15.  On 24 January 2005 the Regional Court gave a decision remitting the case to the investigating judge, to whom it would fall to carry out investigations in such a way as to mitigate, and compensate as far as possible, the handicaps under which the defence laboured.
16.  On 4 March 2005 the head of the AIVD informed the applicant in writing that communication of matters covered by his duty of secrecy was permitted, subject to the following conditions:
The letter continues:
“In order to preclude any misapprehension I stress that this release from the duty of secrecy does not apply to the suspect’s counsel. In the event that counsel wish to make use of information obtained from the suspect with a view to the defence of M, this must be done in consultation with the investigating judge. The investigating judge will then determine whether the (answers to the) questions are of any relevance to the criminal proceedings (strafvorderlijk van belang). If this is the case, the AIVD will then indicate to what extent State secrets are at stake in this context.”
17.  On 1 April 2005 the Head of the AIVD wrote to the investigating judge in the following terms:
“... I consider it of great importance that the suspect (verdachte) should be able to defend himself adequately against the matters of which he is suspected. This entails that he will have to consult his counsel for that purpose. To that end I have granted the suspect conditional release from his duty of secrecy. These conditions are necessary and serve the interest of national security. There exists a certain tension within these frameworks, i.e. a (more far-reaching) release (as requested) of the duty of secrecy and the interests of national security. After all, the AIVD can only carry out its statutory duty within a certain measure of secrecy. Three criteria are of importance in this respect, namely that the AIVD should be able to maintain the secrecy of its current levels of intelligence, its sources and its working methods. These are critical thresholds that can be seen as the practical implementation of the so-called ‘jeopardise’ criterion in the case-law of the European Court of Human Rights.
...
... Two additional conditions apply: 1.  the release from his duty of secrecy granted [the applicant] shall apply solely to communication between the suspect, his lawyers Böhler and Pestman, Public Prosecutor Z. and the court, and 2.  shall take place within the confines of the offices of the Investigating Judge or in the presence of the trial court in a closed hearing.
...
The parties to the proceedings are to submit their questions and other requests to you [i.e. the investigating judge]. You then check whether the questions and requests are of any procedural significance (strafvorderlijk belang) in these proceedings, as you have indicated to me with regard to the three subjects mentioned by counsel. In the affirmative, you offer me the opportunity to consider whether the text of the questions in itself can harm national security.
In the (probably most likely) event that the questions in themselves cannot harm national security, the answer can be provided in the accustomed way, i.e. by means of an official AIVD report ...
In addition, and if the parties to the proceedings consider it necessary, more specific answers can be given by means of, for example, the hearing of witnesses. Perhaps unnecessarily I would observe that section 86(2) of the 2002 Intelligence and Security Services Act (Wet op de inlichtingen- en veiligheidsdiensten) applies.
In the event that the line of questioning (vraagstelling) in itself is capable of endangering national security, it is my responsibility, pursuant to section 15 of the 2002 Intelligence and Security Services Act, to ensure the secrecy of the information that should remain so and accordingly the classification of that information. I therefore propose that you do not place this information, after I have classified it, in the case file and to request the Regional Court to deal with those questions at a closed hearing. I am of the opinion that the above procedural proposal serves the interests of all parties to the proceedings, taking into account the interests involved in national security.
...
The second condition, which is that the suspect should not be allowed to disclose the identities of AIVD members or human sources, appears clear enough to me. All information that, whether or not in combination with other information, may lead to the identities of AIVD members or human sources becoming known, falls within the scope of the second condition for release [from the duty of secrecy].
...
As regards the third and fourth conditions, I am of the view that these too are sufficiently clear: [the applicant] is released from his duty of secrecy vis-à-vis his counsel Dr B. Böhler and Mr M. Pestman in so far as consultation between the suspect and his counsel [Dr] Böhler and Mr Pestman relates to the crimes with which he is charged. In the event that counsel wish to discuss documents with the suspect which they may wish to add to the case file, the third and fourth conditions should be interpreted to mean that the documents must be relevant and directly necessary for the defence in this case and may possibly be added to the case file. [These requirements of] relevance and direct necessity also apply to the preparation of requests and defences.
As to the latter condition: if and when such a procedure becomes a real possibility I will consider, if asked, whether release from the duty of secrecy, conditional or not, is possible.
...
Fourthly, you have asked me to react to the witnesses requested by counsel. I presume that you mean the AIVD members. I am of the opinion that this is above all a matter of criminal procedure, the public prosecutor indicating in her letter that the questions counsel would like to ask relate primarily to the working methods of the AIVD, the spreading of the leaked information and the internal investigation into this. I can agree with the position taken by the public prosecutor that these questions can most probably be answered by me or my deputy during a witness hearing. Whether and to what extent national security permits the questions to be answered will have to be seen for each question. This will require me first to have the questions intended to be asked at my disposal, so that the Ministers of Justice and of Internal Affairs and Kingdom Relations can decide together and in due time on the application of section 86(2) of the 2002 Intelligence and Security Services Act.
As to the possible questioning of AIVD members as witnesses, I would ask you to make it possible, in pursuance of Article 187c of the Code of Criminal Procedure, for special access to be granted to an additional AIVD member. This person can consider the interests of national security for each specific question during the interrogation. This will also permit the defence to put ‘sub-questions’, questions arising from the questions previously submitted in writing. The hearing of witnesses will thus, in my opinion, considerably speed up the pace of the proceedings – at least as far as the hearing of witnesses is concerned – since the (additional) AIVD member present will in many cases be able to decide almost immediately whether the said sub-questions can be answered. This acceleration of the proceedings, in my opinion, benefits all parties to the proceedings. I am prepared to advise the Ministers of Justice and of Internal Affairs and Kingdom Relations, on the basis of section 86(2) of the 2002 Intelligence and Security Services Act, to consider this in any exemption decision.
...”
18.  On 15 April 2005 the Regional Court gave a decision in which, following the public prosecutor, it refused to make the exemption unconditional. It expressed the view that it would serve no useful purpose to allow the applicant to disclose the identities of AIVD staff members and informants to his counsel. The interests of the applicant were sufficiently protected inasmuch as the exemption covered information strictly necessary for his defence. The Regional Court ordered the investigating judge to hear thirteen witnesses referred to by name and seven witnesses referred to by a code name or number. It refused to order the hearing of fifteen other witnesses referred to by a number and one named witness immediately, leaving that decision to be taken by the investigating judge after a particular witness, an AIVD staff member called B., had been heard. As to the partially blacked-out documents, the Regional Court noted that it too was thereby prevented from considering whether they held secret information within the meaning of Articles 98 and 98a of the Criminal Code (Wetboek van Strafrecht, see below); even so, the prosecution interest in maintaining secrecy prevailed.
19.  The named witness B. was heard on 23 May 2005 and 6 June 2005. It appears that he refused to answer certain questions because of his duty of secrecy.
20.  It appears that on 9 June 2005 the investigating judge decided to refuse to hear the sixteen witnesses requested by the defence for lack of available time (agendatechnische redenen).
21.  On 17 June 2005 the investigating judge decided that the unnamed witnesses permitted to be questioned would be heard at a secret location, under heavy disguise and with the use of voice distorting equipment. A representative of the AIVD and legal counsel of the State would attend in addition to the prosecution and the defence.
22.  The defence lodged an objection against the investigating judge’s decision of 17 June 2005 with the Regional Court, stating also that they would not cooperate in any witness hearing held at a secret location. They also asked for the named witnesses already heard to be relieved of their duty of secrecy and to be heard anew.
23.  The Regional Court held a hearing in camera on 5 July 2005. The defence outlined its provisional strategy, which was to aim for an acquittal by identifying potential sources of the leaks other than the applicant and by demonstrating that the documents leaked did not contain State secrets properly so-called. They also wished to establish the applicant’s attitude to his work for the AIVD. This strategy required the applicant’s former direct colleagues to be questioned and uncensored copies of the documents in question to be made available to the defence and the court.
24.  On 8 July 2005 the Regional Court gave an order for two further named witnesses to be heard but dismissed the defence’s objection for the remainder.
25.  On 14 July 2005 the defence challenged two judges of the trial chamber who had also taken part in the decision of 8 July 2005, arguing on various grounds that positions taken in the latter decision prejudged the outcome of the trial.
26.  The following day, 15 July 2005, the challenge was dismissed and the trial hearing was resumed. The defence asked for documents to be added to the file, including all those found in the applicant’s desk. The Regional Court remitted the case to the investigating judge for the hearing of the witnesses authorised to be heard, in so far as they had not already been heard, and requested the prosecutor to add documents to the file including a description – to be prepared by the AIVD – of the documents found in the applicant’s desk.
27.  Witnesses were heard on various dates. In so far as they were unnamed AIVD staff members, they were identified by a number; they were heavily disguised and they were placed in a box that left only their upper body visible; and their voices were distorted. The applicant states that it was impossible to discern their body language and facial expressions. He further states that an AIVD official was present, who could – and did – prevent named and unnamed witnesses from answering a proportion of the questions put by the defence, and that this was permitted by the investigating judge.
28.  The trial hearing was resumed on 30 August 2005. Finding no indication that the AIVD information had been leaked by someone else, the Regional Court yet again refused to hear the named witness and the fifteen unnamed witnesses. As to AIVD staff members who refused to disclose certain information based on their duty of secrecy, it stated that the final decision whether to allow this lay with the trial court itself but found that it could not set precise limits as the prosecution wanted.
29.  The trial hearing was resumed on 6 and 7 October 2005. The applicant made no statement.
30.  On 30 November 2005 the trial hearing resumed. The prosecution and the defence made their closing statements.
31.  The Regional Court gave judgment on 14 December 2005. It convicted the applicant and sentenced him to four years and six months’ imprisonment.
32.  The applicant lodged an appeal with the Court of Appeal (gerechtshof) of The Hague.
33.  The appeal hearing opened on 28 September 2006. Among other things, the applicant’s counsel objected to the refusal, in the proceedings at first instance, to allow the defence an unconditional exemption that would allow the applicant and his counsel to communicate unimpeded; to the hearing of unnamed witnesses under heavy disguise, in a closed box that partially hid them from view and with the use of voice distortion, even though they were the applicant’s former direct colleagues; to the withholding of evidence by the witnesses, based on their duty of secrecy as AIVD staff members; and to the withholding of documentary evidence requested by the defence. The prosecuting Advocate General (advocaat‑generaal) conveyed an offer by the AIVD to allow an independent expert to see uncensored AIVD documents and report on their content; the expert proposed had previously been a member of a committee appointed to investigate the internal functioning of the AIVD itself. The defence protested that this expert lacked independence precisely for that reason.
34.  The Court of Appeal delivered an interlocutory judgment on 12 October 2006. Its reasoning included the following:
“The duty of secrecy arising from the 2002 Intelligence and Security Services Act Serviced Act is subject only to the exceptions set out in that Act. The implication is that only the possibility offered by section 86(1) of that Act offers a solution for the applicant’s present predicament.
The interests of State security, which the 2002 Intelligence and Security Services Act and Article 98 and following of the Criminal Code seek to protect, stand in the way of a complete release from the duty of secrecy as the defence would wish and a complete exemption from prosecution for disclosing State secrets to be granted by the Public Prosecution Service. It is obvious that the said duty of secrecy constitutes a restriction of – normally entirely – free and confidential consultation between the suspect and his counsel and that – if it remained in force in its entirety – it would prevent a fair trial. In the present case, the suspect has been granted conditional release from that duty by the AIVD, based on the latter section of the 2002 Intelligence and Security Service Act, as have his two counsel. The conditions accompanying that release, all of which concern interests of State security in relation to interests of the defence in the present criminal proceedings, appear to the Court of Appeal neither unreasonable within the framework of the interests of State security nor unworkable within the framework of the interests of the defence.
...
Finally, it is the case that if the suspect and the defence, if they consider that the space left to them by the said release is not sufficient to conduct a defence meeting the requirements of the Convention and they consider, in their assessment, that he/they have to transgress his/their duty of secrecy further than the conditions governing the release allow, they can plead justification (rechtvaardigingsgrond), namely the interest of a proper defence within the meaning of Article 6 of the Convention. The Advocate General gave the assurance at the hearing of 28 September 2006 that no prosecution would be brought if a violation of the duty of secrecy by the suspect – and as the Court of Appeal presumes, his counsel as well – was justified by invoking Article 6 of the Convention.”
and
“The Court of Appeal assumes that the defence request [for access to the internal AIVD investigation materials] comprises all investigations undertaken by the AIVD after it had become known that a third party, i.e. S., possessed [a copy of a classified AIVD document]. It does not appear from the file that these internal investigations were set out in any report. The case file contains criminal complaints (aangiftes) based on those investigations.
It must be noted in the first place that the defence request does not concern documents in the possession of the Public Prosecution Service within the meaning of Article 30 of the Code of Criminal Procedure; none of the participants in the proceedings is aware of the content of the internal investigations, save for what has been stated by witnesses in this respect, and what is set out in the said criminal complaints. There is therefore no violation of the principle of ‘equality of arms’[1].
Quite apart from the question whether the AIVD, given its duty and responsibility ..., would be willing to submit its report or any written documents concerning its internal investigation to the public prosecution service to be added to the file, the question needs to be considered whether these documents, which do not emanate from any investigatory body, can in reason be relevant to the defence.
The defence has not, in the present case, suggested, let alone shown, that the materials compiled by the AIVD within the framework of its internal investigation have been obtained unlawfully or are unreliable, but only that the documents and information provided by that service have been accepted uncritically (voor zoete koek aangenomen) first by the National Police Internal Investigations Department (Rijksrecherche) and then by the Public Prosecution Service and cannot be checked.
The Court of Appeal takes the provisional view – without wishing to prejudge its final decision [on the question whether the trial was fair] – that the said materials can be assessed based on the statements of the witnesses questioned, albeit, as far as AIVD members are concerned, subject to some restrictions owing to their duty of secrecy.”
It noted the “particular tension between fundamentally opposed interests”, namely the applicant’s interest as a defendant in a criminal trial and the State interest in maintaining the secrecy of AIVD information, but rejected the protests put forward on the applicant’s behalf. The judgment took note of a promise made by the Advocate General not to prosecute for a violation of the duty of secrecy if that violation was justified by reliance on Article 6 of the Convention (gerechtvaardigd is door een beroep op artikel 6 EVRM). It asked the prosecution to submit certain official reports but not the uncensored AIVD documents requested by the defence.
35.  The appeal hearing was resumed on 12 February 2007. The applicant announced that he might, in his own defence, have to reveal State secret information. This prompted the Court of Appeal to exclude the public from the interrogation of the applicant, despite the latter’s protests.
36.  In the course of questioning by his counsel the applicant mentioned the names of particular AIVD staff members; these are not recorded in the official record of the hearing. The Advocate General protested against the mentioning of these names in so far as they were not already to be found in the case file, which in his view was not justified by Article 6 of the Convention, and announced his intention to prosecute if the applicant should “transgress those limits” (mocht hij die grenzen overschrijden). The applicant’s counsel replied that the defence needed these names in order to decide whether to call the persons concerned as defence witnesses and pointed out that the public had been excluded. After the president decided that the Advocate General should be entitled to state a view on the acceptability of questions put to the applicant by his counsel, the applicant stated that he would for the remainder of the hearing comply with his duty of secrecy. Thereupon the hearing was reopened to the public.
37.  On 14 February 2007 the applicant’s counsel Mr Pestman sent the Advocate General a letter by fax, to which was appended a list of questions he and Ms Böhler would have wished to ask the applicant in support of the case for the defence. These questions concerned AIVD working methods and procedures and AIVD members. One question asked the applicant to identify individual AIVD members on a handwritten anonymised organigram by name. Other questions asked the applicant to state the names of AIVD members other than himself who would have had access to the documents found to have been leaked.
38.  The hearing continued on 15 February 2007. The Advocate General announced his intention to prosecute the applicant should he answer questions naming AIVD sources, providing an insight into AIVD working methods or relating to the blacked-out parts of the redacted documents. Responding to protests by the defence, the Court of Appeal referred to its interlocutory judgment of 12 October 2006 (see paragraph 34 above), in which it had stated that if the applicant considered a breach of his duty of secrecy in the interest of his defence he would, if prosecuted, be able to pray the right under Article 6 of the Convention to defend himself in justification. The decision to prosecute, however, belonged to the Public Prosecution Service alone to the exclusion of the courts.
39.  The Court of Appeal gave judgment on 1 March 2007. It quashed the judgment of the Regional Court on the technical ground that the Regional Court’s judgment could not be simply endorsed, convicted the applicant and sentenced him to four years’ imprisonment.
40.  The evidence relied on was the following:
Photocopies of the address book with the post-it note and the redacted AIVD documents were attached to the judgment.
41.  The Court of Appeal’s reasoning included the following:
“In considering whether the positions adopted by the service [i.e. the AIVD] and/or its members as regards the necessary secrecy and in answering the question to what extent restrictions on (among other things) the right to question witnesses can be justified, other issues than that of defining State secrets in a strict sense also play a part. That is apparent from the chapeau paragraph of section 85(1) of the 2002 Intelligence and Security Services Act, which imposes on AIVD officials a duty of secrecy ‘without prejudice to Articles 98-98c of the Criminal Code’. That obligation extends to ‘all information the confidential character of which he knows or ought reasonably to suspect’. Only a ministerial decision as referred to in section 86(2) of that Act can relieve the official of this duty of secrecy if he wishes to act as a witness. The legislature has thus placed the choice in the ‘conflict ... between the interests of State security, which may imperatively require certain sources or information to be kept secret, and the interest of establishing the material truth in, among other things, ... criminal procedure’ [reference to the statutory drafting history of an earlier Act, repealed by the 2002 Intelligence and Security Services Act, omitted] in the hands of the said Ministers.
...
The above leads the Court of Appeal to conclude as follows. In addition to State secrets within the meaning of Article 98 of the Criminal Code there are other matters that (in the view of the AIVD) fall under the duty of secrecy of section 85 of the 2002 Intelligence and Security Services Act. The Court of Appeal deduces, on the basis of what is laid down in section 86 of that Act, that that obligation (in principle) prevails over the duties of a witness in a criminal trial. The Court of Appeal’s examination of the question whether an AIVD staff member has rightly invoked his duty [of secrecy] is necessarily detached/marginal. Things are different where it concerns the question whether the right of the defence to question witnesses is materially impaired, it being relevant, in the opinion of the Court of Appeal, whether the statement of that particular witness is used in evidence.”
and
“The interests of State security, which the 2002 Intelligence and Security Services Act and Articles 98 and following of the Criminal Code are intended to protect, stand in the way of granting a complete exemption from the duty of secrecy as desired by the defence.
It is obvious that the said duty of secrecy constitutes, to some extent, a restriction on – normally entirely – unimpeded free and confidential discussion between the suspect and his counsel and that – had it been in force unmitigated – it would prevent a fair trial.
As the Court of Appeal held in its interlocutory judgment of 12 October 2006, the duty of secrecy is subject only to the exceptions set out in the 2002 Intelligence and Security Services Act.
This means that the situation in which the suspect finds himself in the present criminal case leaves only the avenue left by section 86(1) of the said Act.”
and
“The Advocate General has given the undertaking, at the Court of Appeal’s hearing of 2 September 2006, that [the applicant] shall not be prosecuted if a violation of the duty of secrecy by [the applicant] is justified by reliance on Article 6 of the Convention, with due regard to the demands of proportionality and subsidiarity inherent pertaining to a legal defence (strafuitsluitingsgrond).
The conditions attached to the exemption aforementioned, all of which concern the interest of State security in relation to the interests of the defence in the present criminal proceedings, do not appear unreasonable to the Court of Appeal within the framework of the interests of State security and in the Court of Appeal’s opinion have done no relevant harm to the interests of the defence.”
and
“The Court of Appeal can only answer the question whether the information in issue is to be considered ‘State secret’ or as information relating to State security by referring to the texts, as contained in the file, of [the documents concerned], to the extent that these documents have been added to the file in censored form as appendices to the AIVD’s official record of 15 March 2005, [an uncensored e-mail relevant to one of the charges] and the explanations to these documents given by the AIVD, especially as contained in the said official record of the head of the AIVD of 10 February 2005 and the official record of the acting head of the AIVD of 28 December 2006, which latter report has been verified by the National Public Prosecutor for Counter-terrorism (Landelijke Officier van Justitie Terrorismebestrijding) as appears from the latter’s official report of 29 December 2006.
The Court of Appeal considers itself sufficiently able to determine the nature and character of this information on the basis of these documents, considered in context. For that purpose it is not necessary, in the opinion of the Court of Appeal, to possess or have access to entirely uncensored versions of the information. In this connection, the Court of Appeal has sought, in giving its interlocutory judgment aimed at obtaining a further official report about the type and nature of the State security interest of the information contained in the censored texts portions, to gain optimum understanding of the nature and character of the information. Although the AIVD, in submitting its official record of 28 December 2006 (verified by the National Public Prosecutor for Counter-terrorism), has not entirely kept to the letter of the Court of Appeal’s order, the Court of Appeal has, based on the texts before it, considered in context with the AIVD’s explanations in its official records of 10 February 2005 and 28 December 2006, sufficiently gained the understanding referred to.”
42.  The applicant lodged an appeal on points of law (cassatie) with the Supreme Court (Hoge Raad).
43.  The Supreme Court gave judgment on 7 July 2009 (ECLI:NL:HR:BG7232). It held that the length of the proceedings before it had been excessive and the applicant was entitled to compensation in the form of a reduction of sentence. It therefore quashed the judgment of the Court of Appeal for technical reasons in order to revise the sentence which it reduced by two months to three years and ten months. It held, however, that the appeal was unfounded. Its reasoning included the following:
“5.5.  There is no statutory provision for an exception to the duty of secrecy laid down in section 85 of the 2002 Intelligence and Security Services Act in the event that the official concerned is a suspect. Even then the official is bound by his duty of secrecy and he will not be permitted to divulge information in violation of that duty.
If, however, the trial judge takes the view, whether or not it be in response to a request or a legal argument (verweer) put forward by the defence, that the interest of the defence requires that information falling under the duty of secrecy is disclosed by the suspect, the court will have to weigh the conflicting interests in the case. The guiding principle (richtsnoer) in so doing is whether, if this information cannot be disclosed after all, there can still be a fair trial within the meaning of Article 6 of the Convention.
If the trial court reaches the finding that it is necessary, from the point of view of that Convention guarantee, to take cognisance of that secret information and the handicap for the defence [resulting from not being able to disclose it][2] is not sufficiently compensated by the procedure followed, it will have to determine – for example, by hearing the appropriate AIVD official or officials on this point – whether the duty of secrecy is to be maintained intact in relation to that information. If that is the case, the conclusion will have to be that there cannot be any fair trial and the prosecution will have to be declared inadmissible (zal de officier van justitie niet-ontvankelijk moeten worden verklaard in de vervolging). 5.6.  In so far as the Court of Appeal has been inspired by a procedural framework other than outlined above, it has misinterpreted the law (heeft het blijk gegeven van een onjuiste rechtsopvatting). However, that need not lead to the quashing of the judgment [of the Court of Appeal] for the following reasons. ...”
The Supreme Court went on to find that the compensatory measures had been sufficient in the circumstances: the possibility had been offered to hear AIVD officials as witnesses without disclosing their identities, and the Court of Appeal had been sufficiently informed by the information contained in the case file – the uncensored parts of documents, the official explanatory documents submitted by the AIVD, and the checking of the AIVD position by the National Public Prosecutor for Counter-terrorism – to make a proper assessment as to whether the documents in issue were properly classified State secret.