I have an experimental (EAB) version of an aircraft that is also sold as an LSA (Arion Lightning) - I am not the original builder. The POH provided with the aircraft looks like a copy of the one used for the LSA version. There are some limitations in the POH that do not match any limitations put on with the FAA aircraft certification letter. For example the POH states you cannot operate IFR, which is not a limitation imposed on the aircraft in its operating specs.
I'd like to rewrite the POH to more accurately document how the aircraft can be operated. My question for this group is how is the POH developed for an EAB and who can make changes/revisions. Thanks for any help or pointer to a FAR.
Gerry