creation and verification information. 18.3 Before starting to operate and yearly after registration centers shall audit information system, apply technique and techs ensuring reliable use of system. 18.4 Centers shall possess educated, experienced and competent personnel to assure activity. Article 19. Putting an end to activity of certificate services center 19.1 Putting an end to activity of center is implemented by civil legislation of the Republic of Azerbaijan. 19.2 At least 30 days before putting an end to activity the center posts notices on mass media and other means, warns signature holders possessing valid certificates, certificate services centers certificates of which are guaranteed by that and with which guarantee contracts are signed, and corresponding executive body. 19.3 30 days after the notice is given the centers implements annulment of valid certificates. 19.4 30 days after the notice is given on putting an end to activity of accredited center it shall hand upon consent of signature holder the perfect certificates, information on them and inquires of signature users to another accredited center or corresponding executive body. Certificates not handed are annulled and according to Article 15 of this law given to corresponding executive body to be stored. 19.5 In following cases corresponding executive body can by legislation of the Republic of Azerbaijan annul registration, accreditation of centers and pretend to end their activity: 19.5.1 if documents and information submitted for registration are incorrect or invalid; 19.5.2 if offences are regularly admitted in activity. 19.6 Activity of center serving corporate information system can be ended upon decision of system owner or agreement of participants. Article 20. Rights, duties and responsibilities of signature holder 20.1 Signature holder has following rights: 20.1.1 to get detailed information on centers, their services, signatures, use of signature means and security rules; 20.1.2 to be familiarized with information about him/her gathered in centers; 20.1.3 to complain pursuant to the legislation of the Republic of Azerbaijan on decisions on stopping, restoring or annulling validity of certificate, other issues concerning activity of centers. 20.2 Signature holder shall be capable to create signature and use corresponding means. 20.3 Signature holder bears responsibility for protection of signature creation information and signature means and shall not admit use of them by another person. If control on these is lost or there is danger to this, signature holder shall immediately inform the respective center and demand to stop validity of certificate. 20.4 While using strengthened signature the signature holder shall obey the relations of use stated in perfect certificate. 20.5 Applying to centers to sign contract the signature holder bears responsibility for integrity