Actual Vs. Simulated IR logging

[ranklein]

Hi all,

I've been trying to look for some kind of a rule regarding logging Instrument times (Actual/ Simulated) in the log book.

Is there a rule that requires us to log that time, even as airline pilots that have already passed all their tests (ATPL, ETC.)?

Is there a fix number/ percentage (8%, 10%..) that we take each flight and log it as instrument time?

Mainly interested to know as some authorities require to know that time when converting licenses (FAA TO JAR for example), or when flying different parts of the world and need to convert to a local license.

Thanks!!