Not long ago, I suggested that the indult by which the Authentic Roman Mass could be continued in England after 1970 should really be called (because of the distinguished and ecumenical signatories of the petition seeking it) "The Anglican Bishops' Indult"; or "The Greatsmen's Indult". This, by the way, is the Indult which the roche dicastery claims to know nothing about.
There is now a little more information available in print which, I think, was not previously very widely known. I refer to Unwanted Priest, by Fr Bryan Houghton, Angelico Press.
In 1977, a traddy group wished to make a pilgrimage to a shrine (which I suspect might have been Walsingham). They asked the Diocesan Bishop for permission, under the Indult, to use the Usus Authenticus. He refused, on the grounds that this would be ... I leave it to readers to guess his Lordship's exact word. It begins with a d; is eight letters long; has i three times; and v twice.
You will not find more than a single s. Phonetically, you can disregard the e.
I suggest that you read the full story in Houghton. In maintaining his refusal, the Bishop wrote: "As to the indult, it has become highly ambiguous, and many doubt whether it should ever have been obtained. Be that as it may, the Conference has decided to phase it out--and it falls to each bishop to implement this decision as he sees pastorally right."
Fr Bryan was an ex-Anglican, and so, of course, he peremptorily demanded precise information about when and where this 'momentous decision' was officially published, and also the exact wording. This is the sort of thing which makes us ex-Anglicans so widely loved.
Father concludes his narrative thus:
"I learned from Rome in mid-April 1977 that my bishop had not been perfectly honest with me. In September 1976 it was the Vatican authorities who deemed it possible to require of the English hierarchy that they themselves should ask for the withdrawal of the indult. To the perpetual honour of the English hierarchy, this was refused. But some compromisers, among them my bishop, suggested that the indult be phased out. How devious can one be?"
The emphasis in the above quotation is my own.