Translate the following English sentence to French:
"In those states which have, on paper at least, been complying with MAGPs such as Spain and Portugal, what has happened to the vessels which are removed from the register?"
Qu' est-il arrivé aux navires rayés de l' immatriculation dans les États qui se sont conformés, du moins en théorie, aux POP, tel que l' Espagne et le Portugal ?