The interpretation of that reference i believe is based around an aerodrome in which a TAF is normally available however is unavailable or is desingated as PROV ( provisional), which both require an alternate. However, my understanding is that this regulation is NOT applicable to an aerodrome in which a aerodrome forecast ( TAF) is not normally available IE.many small regional ports.
See ENR 1.10 -1.2.1, when planning to a non IAP destination, the minimum forecast is a GAF.
Anyone else have a different interpretation of these regs?