Act No. 10166 on March 22, 2010) concerning “a request for provision of communications data from a prosecutor or the head of an investigative agency to collect information for investigation” infringes on the fundamental rights of Complainant. D. 2022Hun-Ma126 Complainants are challenging the constitutionality of each act of acquisition of communications data described in Appendix 4 and the constitutionality of Article 83, Section (3) and the proviso of Article 83, Section (4) of the Telecommunications Business Act. However, Complainants are those whose communications data have been provided to investigative agencies such as prosecutors or *** Agency. Thus, the subject matter of review is limited to the part of Article 83, Section (3) of the Telecommunications Business Act relevant to Complainants. Since Complainants made no independent argument against the constitutionality of the proviso of Article 83, Section (4) of the Telecommunications Business Act, the proviso thereof is excluded from the subject matter of review. Therefore, the subject matter of review is whether each act of acquisition of communications data of Complainants listed in Appendix 4 and the part of Article 83, Section (3) of the Telecommunications Business Act (wholly revised by Act No. 10166 on March 22, 2010) concerning “a request for provision of communications data from a prosecutor or the head of an investigative agency to collect information for investigation” violate the fundamental rights of Complainants. E. Sub-conclusion As a consequence, the subject matter of review in this case is whether each act of acquiring communications data of Complainants listed in Appendix 3 and Appendix 4 (hereinafter referred to as the “Act of Acquiring of Communications Data”) and the part of Article 83, Section - 27 -