IFR Alternate Question

[MyNameIsIs]

Can't help with a Jepp ref, but.............


AIP ENR 1.1 57.1.3
When an aerodrome forecast is not available or provisional, the PIC must make provision for a suitable alternate that has a firm forecast.


AIP ENR 1.1 57.2.9
For IFR Flights, the alternate minima are as follows:
a) For aerodromes with an instrument approach procedure, the alternate minima published on the chart.
b) For aerodromes with an instrument approach procedure where an aerodrome forecast is unavailable or provisional, the PIC must make provision for a suitable alternate.
c) For aerodromes without an instrument approach procedure, the alternate minima is the lowest safe altitude for the final route segment plus 500ft and a visibility of 8km.


Now, what we have here is interpretation issues- just like the cirlcing minima but let's not start that up again!
Key words in the first bit of bolding - "AERODROME FORECAST".
The 2nd bolding says that even if you have an approach, but no aerodrome forecast, you need an alternate.
The 3rd bolding gives provision for IFR flight to a no-aid aerodrome but which does have a forecast- the interpretation problem arises because they do not state WHERE the cloud and vis info must come from.