Re: No Asic = No Fly !!!! What a joke !
The letter states that you're up for the $2200 fine if you haven't applied for the security checks after 31 Dec 05 and proceed to these airports.
The extension is for people that have applied before last year but don't need to display an ASIC until 31 Mar 06.
Yet again the wording from a CASA document is ambiguous. In my opinion you can still fly into those airports mentioned in the letter as long as you've applied.
What I would do in your case is make a copy of the security checks document and carry it with you as proof that you've got your application submitted. I personally would even go down to the local police station and have them certified as proof of original.