Originally Posted by
PhotoTom
CPLs should be 5 years, birthday to birthday.
When an individual gets their first CPL, the issue date does not match the birthdate (unless the two dates coincidentally coincide), therefore, the initial CPL is valid no less than 4 years, but no more than 5 years from the date of issue and expires on the individuals birthdate that falls in that range.
From there, normal renewals should be 5 years, birthdate to birthdate. Exceptions apply for late renewals, revoked/re-issued CPLs, etc.