<P> The next four digits mean the region of his / her birth registration, and the next 1 digit is a serial number of registration within the date and the region . The last digit is a check digit . </P> <P> In Sri Lanka, all citizens over the age of 16 need to apply for a National Identity Card (NIC). Each NIC has a unique 10 digit number, in the format 000000000A (where 0 is a digit and A is a letter). The first two digits of the number are your year of birth (e.g.: 88xxxxxxxx for someone born in 1988). Add 500 to middle 3 numbers after first two numbers for females . The final letter is generally a' V' or' X' . An NIC number is required to apply for a passport (over 16), driving license (over 18) and to vote (over 18). In addition, all citizens are required to carry their NIC on them as proof of identity . NICs are not issued to non-citizens, but they too are required to carry some form of photo identification (such as a photocopy of their passport or foreign driving license). </P> <P> In Taiwan, an ID card is mandatory for all citizens who are over 14 years old . Every citizen has a unique ID number . The ID card has been uniformly numbered since 1965 . A valid National Identification number consists of one letter and nine - digits, in the format A########C. The letter ("A") records the card holder's first location of household registration, which is usually where they were born . The first digit depends on gender; 1 for male, 2 for female . The last digit ("C") is a checksum . Thus the total number of IDs is 208,000,000 . </P> <P> The letter usage (i.e., indicating the household registration location) is as follows: </P>

What is national identification number in ds 160