Trusts established or maintained out-of-state; grantor liable for tax.

The establishment or maintenance of a trust outside Wisconsin by a Wisconsin resident as grantor, the income from which trust is taxable to the grantor or to any person other than the trust under the internal revenue code, is hereby declared to be a tax avoidance device designed to avoid the legal application of the Wisconsin income tax to income properly taxable to the grantor or such other person. Any Wisconsin resident who is the grantor of such a trust shall be liable for the Wisconsin income tax on the income of such trust which is federally taxable to such grantor or other person under the internal revenue code.