Experimental FAA registration

I know this has been covered in the past but I need an update. A
fiend is purchasing a glider that is registered experimental under
Racing/Exhibition. It presently has a "letter of operation" that
limits it to 300nm from the home airport. It requires "notification"
to the FAA when moved out of the area. Questions:
-Is this the only way that the "Letters of Operation" are written for
sailplanes?
-The "Letter of Operation" is not very specific on how or how long
before the move, one notifies the FAA. Can it be done by phone, fax,
email, snail mail?
I have had two new experimental sailplanes in the past and did not
have the 300nm or notification restrictions in my "L o O" after the
initial required time was flown.

Any input will be appreciated.

Tom
Idaho