To expand this topic further:
JAR-OPS 1.295 Selection of aerodromes states:
"(d) An operator must select two destination alternates when:
(1) The appropriate weather reports or forecasts for the destination, or any combination thereof, indicate that during a period commencing 1 hour before and ending 1 hour after the estimated time of arrival, the weather conditions will be below the applicable planning minima; or
(2) No meteorological information is available."
While JAR-OPS 1.297 Planning minima for IFRflights says:
"(b) Planning minima for destination and destination alternate aerodromes. An operator shall only select the destination aerodrome and/or destination alternate aerodrome(s) when the appropriate weather reports or fore-casts, or any combination thereof, indicate that, during a period commen-cing 1 hour before and ending 1 hour after the estimated time of arrival at the aerodrome, the weather conditions will be at or above the applicable
planning minima as follows:...
"
So, I read this many times and I still do not understand 
if we have to have fuel for new (provisional) destination where the weather is good + alternates for provisional destination or fuel for original destination (with bad wx) + 2 alternates.
If anybody could clear this for me I would appreciate it very much