Rightful claimants can register any domain name that fulfils the following requirements:

• minimum of 3 characters among the letters "A-Z" with no difference between capital and lower case letters, numbers from "0-9" and the hyphen "-"
• first or last character can not be a hyphen
• hyphen can not be positioned on the 3rd and 4th position simultaneously
• domain name can include from a minimum of 3 to a maximum of 63 characters
• domain name must not be identical to a previously registered .si domain name (that is still in domain name database)
• domain names 113.si and 112.si are reserved for the needs of the Police (113) or the Administration for Civil Protection and Disaster Relief (112).