19 C.F.R. § 356.6
Receipt of notice of a class or kind of merchandise determination by the Government of a FTA country
Where the Department has made a class or kind of merchandise determination, notice of such determination shall be deemed received by the Government of a FTA country:
(a) On the date of publication in the official publication of the determination; or
(b) If the determination was not published in the official publication, on the date on which the Department conveys a copy of the determination to the electronic mail address provided by the Embassy of the FTA country during its normal business hours.