You can download it in full here or read the short version on Rorate Caeli.
Pius XII's provisions
The bottom line is that the paper recommends a restoration of the three hour Eucharistic fast that came into force in 1957 (but was abolished in 1964 in favour of one hour).
The argument for a longer fast before reception of the sacrament goes firstly to the long tradition on this, and secondly to the desire to promote a greater reverence for the sacrament, and a sense that it should be prepared for.
The argument for a three hour fast - rather than the stricter older fasts that previously applied - is purely pragmatic, given the prevalence of afternoon and evening masses these days.
I totally agree.
We need (to emulate the Eastern Churches in adopting!) these symbolic practices to help us recover a Catholic culture.
Let's hope the FIUV campaign gets some traction.
And in the meantime, maybe our bishops could consider at least going as far as the English bishops have done, and restore Friday abstinence?