Section: 6.2.2 Composition of IMEISV
Content: The International Mobile station Equipment Identity and Software Version Number (IMEISV) is composed as shown in figure 11. Figure 11: Structure of IMEISV The IMEISV is composed of the following elements (each element shall consist of decimal digits only): - Type Allocation Code (TAC). Its length is 8 digits; - Serial Number (SNR) is an individual serial number uniquely identifying each equipment within each TAC. Its length is 6 digits; - Software Version Number (SVN) identifies the software version number of the mobile equipment. Its length is 2 digits. Regarding updates of the IMEISV: The security requirements of 3GPP TS 22.016[ International Mobile station Equipment Identities (IMEI) ]  [32] apply only to the TAC and SNR, but not to the SVN part of the IMEISV.