If you read the AMCs etc you’ll see it is full of “should”s and “may”s rather than “shall” and “must”which gives the implication of options and choice by the ATO.
The HT should then draw up a training plan for the individual appropriate to what experience, recency etc which should be submitted for approval by the appropriate CA. Depending on the HT and ATO this often falls into the “too much work/too difficult” category and what’s written becomes policy.
To be fair if you’ve been out for 6 years it would probably be the sensible option to do the full course again.