Slovenia introduced the Unique Master Citizen Number on January 8, 1977 and applied
to all citizens born before then and alive at the time. The Unique Master Citizen
Number is a standard identification number, assigned by the Ministry of the Interior.
The Unique Master Citizen Number consist of 13 digits as follows:
DDMMYYYRRSSSX
DD - day of birth
MM - month of birth
YYY - year of birth, last three digits
RR - a constant value 50
SSS- serial number combination of sex and serial number for persons born on the same
day (000-499 for men and 500-999 for women)
X - checksum of first 12