Home › CFR › Title 26 › Part 426 CFR Part 4 — Temporary Income Tax Regulations Under Section 954 of the Internal Revenue Code§ 4.954-0— Introduction.§ 4.954-1— Foreign base company income; taxable years beginning after December 31, 1986.§ 4.954-2— Foreign personal holding company income; taxable years beginning after December 31, 1986.