This agreement should have come into force in 1996, but did not do so because it was not ratified by some countries, notably the United States, which was one of its main proponents but which, in the end, chose to continue supporting its own shipbuilding industry, as has also already been said here.
Cet accord aurait dû entrer en vigueur en 1996, mais il n'est pas entré en vigueur à cause de sa non ratification par certains pays, notamment les États-Unis, leur principal promoteur qui a opté finalement pour le maintien des aides à la construction navale, comme cela a été dit aussi.