AIP GEN 3.3 para 2.1.1 my bolding:
Pilots are responsible for obtaining information necessary to
make operational decisions. To ensure that accurate information
is obtained in adequate time, pilots must take into consideration
that ATC initiated FIS is limited to aircraft within one hours flight
time of the condition or destination at time of receipt of the
information by ATC. The only exception to this is SIGMET
information, which shall cover a portion of the route up to two
hours flying time ahead of the aircraft.
This has obvious implications if you are outside the time frame, and ATC/ATS
will not be aware of any alternate(s) you may be carrying, hence you need to monitor them also.