27 C.F.R. § 26.50
(b) Wine. Persons in Puerto Rico who ship wine to the United States shall comply with the formula requirements of part 24 of this chapter. If any wine contains liquors made outside of Puerto Rico, the country of origin for each such liquor shall be stated on the formula. All formulas required by this paragraph shall be submitted on TTB Form 698 Supplemental, in accordance with § 26.54.
(Approved by the Office of Management and Budget under control number 1512-0204)
[T.D. ATF-198, 50 FR 8549, Mar. 1, 1985. Redesignated and amended by T.D. ATF-459, 66 FR 38551, July 25, 2001; T.D. TTB-91, 76 FR 5479, Feb. 1, 2011]