(1) An alien registration number assigned pursuant to Article 40 shall be a 13-digit number indicating the date of birth, gender, registration office, etc. <Amended on Sep. 29, 2016>
(2) One alien registration number shall be assigned to one person, and no number already assigned shall be assigned to another person.
(3) The Head of an Immigration Office, the head of an office, or the head of a branch office having jurisdiction over the place of stay shall assign a new alien registration number when an alien who has filed for registration pursuant to Article 31 of the Act (hereinafter referred to as "registered alien") has reported on the changes in matters registered by aliens on the grounds of change of gender or date of birth among matters under subparagraph 1 of Article 35 of the Act. <Added on Dec. 27, 2022>
(4) Where a person who has obtained a registration number for registration of real estate pursuant to the proviso of Article 12 of the Regulations on Procedures for Assigning Registration Numbers for Registration of Real Estates of Unincorporated Associations or Foundations and of Foreigners before filing for alien registration under Article 31 of the Act files for alien registration, the relevant registration number for registration of real estate shall be assigned as an alien registration number; provided, where the gender or date of birth is changed after a registration number for registration of real estate has been assigned, a new alien registration number shall be assigned. <Added on Dec. 27, 2022>
(5) Except as provided in paragraphs (1) through (4), matters necessary for the numbering system of alien registration and procedures for assigning alien registration numbers shall be determined by the Minister of Justice. <Newly Inserted on Dec. 27, 2022>[This Article Wholly Amended on Nov. 1, 2011][Moved from Article 40-2 <Nov. 1, 2011>]