Not sure about Echuca - does it has an instr apch?
Anyway, Just because it doesn't have an instrument apch procedure doesn't mean it doesn't have a TAF. Think of navaid being unserviceable. The procedure is there but you can't use it on that day. Therefore, use the criteria at (c).
Remember also the criteria for CAVOK and cloud base. The LSALT + 500 could be above that. CAVOK may not be enough.
Look at the area forecast. If you reckon from that you have no more than SCT below LSALT +500 on the last route sector and 8 k vis then you don't need an alternate to fly IFR in case (c).
Sorta half answers your question I guess.
Edit - must have posted my reply pretty close to yours, and there is no such thing as a dumb question!
Last edited by Razor; 3rd Jun 2009 at 03:04.