California nonresident board members of companies based in California may soon be subject to income tax in California, regardless of whether they perform services within the state, if a newly proposed tax regulation is adopted. The proposed regulation — new section 17951-8 of Title 18 of the California Code of Regulations — released by the Franchise Tax Board of California on September 24, 2020, treats the compensation of a California nonresident, non-employee director of a…