Teabagyl: I'm sorry, I didn't see that question. 2003 According to wikipedia thes were the changes:
Bi directional
telemetry banned
[55] HANS (head and neck safety) system mandatory, change to point scoring system, points now being awarded down to 8th place, actual points scored now to run 10,8,6,5,4,3,2,1 from 1st to 8th place, testing allowed on a Friday of a race meeting in exchange for a reduction of testing mileage allowed outside of the
Grand Prix calendar to make it more affordable for smaller teams, changes to qualifying session with only one flying lap now allowed for grid position with the 107% rule no longer applied, cars may not be refueled between final qualifying and the race start.
[47]
In your opinion which of these hurt Ferrari and when were they decided?