Dear All,
I readily admit that I am no expert on canon law, but from quickly skimming a copy of the supposed "document" at the Roman Catholic Faithful website I am a bit suspicious.
It is a terrible copy - reproduced from what appears to be a vintage type-written text. To my untrained eye it seems very sloppy and unprofessional to be genuine. However, the article Johan posted did mention something about a translation from the Latin, so this may be a very poor quality rendition.
One thing that caught my eye which is pertains to the Byzantine Forum (must stay on topic

) is the opening words :
From the Supreme and Holy Congregation of the Holy Office for all Patriarchs, Archbishops, Bishops and other Diocesan Ordinaries "even of the Oriental Rite" [quotation marks in the original]
I dunno about you, but this looked kinda fishy to me - not exactly what would appear on an official document. Again I suppose it could be a bad translation.
PAX