From the Taiwan News article nonredneck linked to above, emphasis added:
The first phase to be rolled out on July 1 this year will be targeting “frequent online importers” which is defined by Taiwan Customs Administration as persons who are making more than two online purchases per month, or importing items more than six times within half a year.
Smartphone numbers might be used to identity and trace the recipient to ensure it is the same person making high volume overseas online purchases, said the ministry officials. …
By the second phase the policy will follow the concept of “limiting imports to low priced products,” which will lower the bar for tariffs and VAT placed on online purchases from over NT$3,000 to NT$2,000 by Sept. 1, 2017.
So … they’ll track by cellphone numbers? Not sure how well that will work - I assume that anyone who makes a living this way will just get multiple cellphones.
If that article is accurate, and if the information still holds, then the 6 orders per six months policy is already in effect, but the move to 2,000 isn’t yet in effect. I guess iHerb’s message in September will be changed to “no more than 6 orders with a value below NTD 2,000 [rather than 3,000] … within a half-year period”. But last I heard - and all I know is from forumosa! - I had the impression this policy was still under review.