Oh dear. The Dutch Tutch plot went wrong.
Firstly, the formula Accipe Spiritum Sanctum which the Dutch Tutchers used, was indeed once regarded as the Form universally among Roman commentators. This was because, by analogy with Baptism, people expected the Form to be words uttered simultaneously with the Matter. And Accipe ... is what the Consecrator actually said while imposing hands. But Accipe is itself quite a late addition to the rite. The true Form should historically be sought in words of the Eucharistic-style Preface sung separately from the Imposition of Hands. In 1947, Pius XII made that clear. And the Tutchers had not say that Preface.
(There is a masterly example of Sod's Law here. Accipe was the Anglican Form for Episcopal Consecration from 1550. Leo regarded it as inadequate qua Form, despite the fact that Roman writers regarded it as the Form of the Sacrament. However, because of the theological consensus that it was the Form, the Tutchers used it (what else, they wondered, were they supposed to use?) in the Remedy-Apostolicae-curae plot. It was then ruled out of court as the Form by Pius XII, not on the grounds of any inherent inadequacy but because the consensus among liturgists had shifted to the belief that the Form should be sought in the words of the venerable and ancient Consecratory Prayer of the Roman Rite. This ancient Prayer was itself subsequently unceremoniously ejected from the Roman Pontifical by Bugnini after the Council because he thought - get this - that it signified the grace of Episcopal Order so much less well than some old oriental Prayer he found under a hedge somewhere and dragged in instead. You couldn't have made all that up, could you?)
The next Fly in this Woodpile arises from the failure of the Anglican bishops who were supposed to be passing on the Tutch to do so in accordance with the protocols. It seems that some of them stopped saying anything out aloud. Thus, even were Accipe to be regarded as adequate, these gentlemen were not dishing out the full works. An element here, too, was that Anglican ecclesiastical lawyers apparently know no Latin. After every Dutch intervention they filled out the Latin protocols with gibberish ... operating on the Lower Third principle that if you make nearly every Latin word end in -i, half of them will be right. I have seen Eric Kemp's set of the Protocols; one of them is made out to say that the Archbishop of Utrecht was himself consecrated by the Archbishop of Canterbury in 1974 and that he himself on the same day simultaneously consecrated Bishop Eric!
This may very possibly be the reason why the CDF, when Bishop Graham Leonard showed them photocopies of the documents, were underwhelmed. They decided that they could not give his Orders a clean bill of health, but they did concede that there was an element of uncertainty about the application to his situation of Apostolicae curae. So they ordered his ordination to the presbyterate to be sub conditione. However, Bishop Graham used to like to remind people that CDF had not considered the question of his Episcopal Orders but only of his priesthood; he was convinced that the reason for this was that they foresaw that if they considered his episcopal Orders they would find them valid and then be embarrassed by finding that they were in possession of a perfectly formed married bishop with a perfectly formed wife!