c) information provided by employees on fellow employees, unless authorized in writing by the latter. 3. In the cases enumerated above, with oral requests, these shall be put in writing, in duplicate, by the receiving officer who then provides a copy to the applicant. 4. Whenever a disabled person seeks to make a request staff attending to them shall take all necessary steps to assist the applicant. Article 16 (Deadline for making information available) The competent administrative authorities shall make documents available for consultation or use in proceedings and forward certificates requested no later than twenty one days after the date of submission of request. Article 17 (Service Free of charge) Information is provided free of charge, except for document reproduction, notarized statements or affidavits [certificates] which are subject to fees. Article 18 (Exercise of the right to information) The right of access to information may be realised through the following methods: a) orally, in writing or through gestures [sign language]; b) reproduction of documents; c) forwarded notarized statement; d) free consultation carried out in the relevant departments; e) issuing of certificates. Article 19 (Submission of incorrectly supplied information) In case of error in providing classified information the applicant is never held liable for disclosing the information. Article 20 (Restrictions and limitations) 1. The right to information may be restricted, rendered conditional or limited once the requested information is classified as State secret, Secret, Confidential and Restricted.   5