The current FAA Order 8130.2F, Chg 3 has all the information you need.
This is the document your FSDO uses to create the ops limitations for
your experimental glider. If your airworthiness certificate and ops
limitations are pre-1993, then you need to not do anything, unless
your ops limitations specify otherwise. If post 1993, then you have to
follow the requirements of the limitations and the order (it's all in
the order somewhere).

When you fax your annual program letter in to the FSDO, your PI at the
FSDO reads it and then puts it in the file they have on your
experimental aircraft. About the only time it comes back out is when
you have an accident, or otherwise come to the attention of the FSDO,
perhaps a change in limitations, or you want to modify the aircraft or
whatever. At least that what happens in the Seattle FSDO.

Jim