I am going to disagree with Carin's assessment of this not being NAIS initiated. It states in the NAIS Business Plan that EIA testing is the best way to identify and track equine and from what I have read a feasible way to get all states, farms and individuals to come under the NAIS system.
Most states already have Coggins (EIA) testing to transport equine between states, but some states have yet to make it mandatory - to keep their federal program monies for NAIS - they have to have EIA testing as mandatory.
Here is a link to the NAIS Business plan - on page 28 it starts to speak to the Equine Industry.
NAIS Business Plan
Cost of NAIS
To further this USEF is a proponate of NAIS and you will have to have a Smart Card for your horse/pony to be able to eligible for any of their programs - EIA (Coggins testing) is the third item on the smart card.
If you are unaware of NAIS - I suggest you read up - this will effect your farm. It will cost a pretty penny if you have over a few head of horses/ponies.
Unfortunately the Fed Gov sees it as a money bank to promote traceability. Unfortunately it will come to a point where we have to report everytime we take a horse or pony off of our premise to a state or federal database.