According to Carol Tan of the IRS, proposed regulations for the international provisions of the GOP tax law will be complete before the end of the year. In order for final regulations to be retroactively applicable starting on Jan. 1, 2018, all regulations must be finalized within 18 months of enactments or June 2019. The IRS hopes to give the public at least six months to comment on proposed regulations, leaving them with a December 2017 deadline to issue proposed guidance on the GILTI, FDII, BEAT, and other provisions.