Good point, I just re checked 183 and there is no mention of 305100 it’s written 300000 to 400000.
Sorry for my mistake.
My mistake came from an old letter i have from FFSA about this FIA 183 where they clearly mention 305100 were they describe how to apply 183 (sorry it’s in French).
For info I’ve placed this document in my drobox:

https://www.dropbox.com/sh/mkuf3nmoz...sk57m-dma?dl=0