An exception to the corresponding restriction code.
For example, if 21 is a restriction code in the Local RPL, and a number that begins with 21 (such as 213-3333) is dialed, the call is blocked. However, if the Local RPL also includes the permission code 213, a call to 213-3333 is permitted.
Permission codes can include a maximum of 20 digits.
See also: restriction code; supplied RPLs