JAR days: approved IR with 30+ hours sim time, then MCC with 20+ hours - both approved courses. Still plausible nowadays where a marginal CB-IR course candidate may exceed minimum course hours in the sim phase where necessary, as well as up to 5 hours sim time on a modular CPL. Etc. Of variable benefit to an IRI candidate of course, as we saw in 2012 with a rush for FIs to add the Applied IF course with minimum requirements, and those requirements often gained more spuriously. Not all were successful on the course or AoC!