I first heard of the MP (motu proprio) (which could be about anything, but in particular here, about the derestriction of the Latin mass) from Fr Z at WDTPRS about nearly a year ago. He and other supporters of the 1962-style Mass, had been following the rumors and reading Pope Benedict XVI's chessboard-like moves to predict just when is this MP going to 'liberate' this 'traditional' Mass—currently, if I understand it right, priests require their bishops' permissions to celebrate Mass ad-orientem and in the traditional style. (Exactly what this means, I have no idea apart from the videos i've seen on Youtube, since I was born & later entered the Church way after the Novus Ordo Mass was established as a practice.)
After this letter was given to about 30 bishops last week and the release date set to be for July 7th, it's finally here! I don't know whether there are any 1962-style masses in Singapore, but it'd be at least interesting to attend one.