nature with those unto which they are united, and are placed under the right of patronage; such [accessions], if they have not as yet been carried into full effect, as also sucn as shall henceforth be made, at the instance of any person soever, by what authority soever, be it even apostolic, shall, together with the said unions themselves, be regarded as having been obtained by surreption; notwithstanding any form of words therein employed, or any derogation which may be held as expressed; nor shall [such unions] be any more carried into execution, but the benefices themselves so united, shall, when they fall vacant, be freely conferred as previously. But those accessions, which, having been made within the last forty years, have obtained their effect and a complete incorporation; such shall nevertheless be reviewed and examined by the ordinaries, as the delegates of the Apostolic See; and those which shall have been obtained by surreption, or obreption, shall, together with the unions, be declared invalid, and the benefices themselves shall be separated, and be conferred upon other persons. In like manner also whatsoever rights of patronage over churches, and any other benefices of what kind soever, even dignities previously free, which have been acquired within the last forty years, or that may henceforth be acquired, whether through an increase of the endowment, or in consequence of rebuilding, or from some other like cause, even though with the authority of the Apostolic See, shall be carefully taken cognizance of by the said ordinaries, as delegates as aforesaid; and they shall wholly revoke such [rights of patronage] as they shall find not to have been legitimately established on account of some most evident necessity of the church, or benefice, or dignity; and they shall brmg back benefices of this kind to their former state of liberty; without injury, however, to the incumbents thereof, and after having restored to the patrons whatsoever they may have given for this purpose; any privileges, constitutions, and customs, even though immemorial, notwithstanding.