Grassfield,
what I have is a German text by the first secretary of the Italian Embassy in Berlin / Germany.
He states that the Italian Parliament has decided on the 24th of April in favour of the Governments decree Nr.16 , which contains the changes in the Luxury tax for Airplanes (45 days etc.)
Maybe you just ask your Embassy for an explanation in Swedish?
This is the link to the italian parliaments paper (pages 49 & 50)
Camera.it - Lavori - Resoconti delle Giunte e Commissioni - Dettaglio resoconto
I sent this link to the guy in the Embassy and asked wether its in force or not and he said yes.
Hope that helps a bit...
Yours
h_d