Doesn't make sense. I thought it was like swimming and bike riding - once you done it you don't forget it. All I get are annual refreshers as it should be.
So if a skipper's CRM validity runs out he can therefore go back to flailing FOs with a buggy whip?
It's a good question. I've tried finding it in EU-OPS where it specifically states for technical recurrents that the validity is one year from the date that the test was taken plus the remainder of that month. It has no such statement for CRM courses. However, I have worked for at least one well-known charter airline that just bunched CRM with the rest of the annual recurrent stuff and treated it the same with regards expiry.