Thanks for the laugh Capn Bloggs.
So using your late forecast change with fog as an example, requiring an alternate as you said (was holding fuel okay?). There you are inbound to Perth in your B717, passing through transition on descent, flying the star. The Bumet in their wisdom add some requirements that you were not aware of when you departed Paraburdoo.
Q1 How are you going to know about it? Do you hear approach read out new TAFs very often?
Q2 If you did know by some method, ACARs etc, and you DO NOT have the extra fuel but you can see bloody field, what would you do?
Q3 If you land are you "legal"?
Q4 Will you report yourself.
Happy Days