power.r
From CAA LASORS...
G1.3 'Credits form the ATPL(A) Theoretical Knowledge Exams':
The holder of a valid JAR-FCL CPL(A)/IR with
JAR-FCL ATPL Theory credit will be credited
the JAR-FCL ATPL(A) Theoretical knowledge
examination for a period of 7 years from the last
validity date of the IR(A) entered in the CPL(A).
Basically, don't leave your IR for more than 7 years without renewing it or you have to sit the 14 CAA exams again, that would be a nightmare!