That's a significant flaw with the marketplace moving to noble only.
All their ava is noble and they don't import from Vanuatu like Fiji does, so I guess they didn't put much thought into it. They don't police it so it's not a big deal now, but if the industry keeps growing and it becomes an important economic crop for them, things may change and perhaps they will review the standard if a false negative occurs. IIRC, GS found that the ratio increases with age, so knowing your preference for strong kava, you would not want to drink Samoan ava that failed this test.
The major concern with Samoa (and Tonga and Fiji) is stem peelings and it's a pity that they didn't give that more attention in the Standard.
While the Samoa 'Ava Standard appears hastily put-together, the fact that they've begun thinking about quality and taking steps to improve, protect, and sustain the industry is a positive thing and should be celebrated.