When taxable in another state.

For purposes of allocation and apportionment of income under the Uniform Division of Income for Tax Purposes Act, a taxpayer is taxable in another state if: A. in that state he is subject to a net income tax, a franchise tax measured by net income, a franchise tax for the privilege of doing business, or a corporate stock tax; or B. that state has jurisdiction to subject the taxpayer to a net income tax, regardless of whether the state does or does not.