Good one Pyro and good luck with the letter. You've done a better job than I could have done.
I have recently been communicating with a few labs in the US to see if I can find one that is accredited as required by our ATO. They all seem to be both confused and amused in that they already test biodiesel to a standard....the ASTM6751 Standard guidelines.....so what more do you want they ask. By the way, ASTM stands for American Society for Testing and Materials and is an International standards organisation.