I think the ACV is part of the pre workup to see how the patient responds. I assume it's like the succinic acid - you take a bit as a challenge to see how the body responds first.
I think the succinic acid challenge is only mentioned in the v2 pdf version. From memory anyway. Here we go from v2:
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30 mg approx of succinic acid reverses almost all cfs symptoms for me for 6 to 8 hours. I didn't need to go up to 100mg, the response was so strong I would probably get good effect at 10mg. I was just eager to know if his stuff worked and whether it would work for me too, and this way was quicker than waiting to see if the immune system would activate when taking all the mushrooms and stuff. I plan to try the full thing soon but I am still missing the sodium benzoate and some digital weight scales.