Wis. Stat. § 409.307
Par. (b) is amended eff. 7-1-13 by 2011 Wis. Act 206 to read:
(b) In the state that the registered organization, branch, or agency designates, if the law of the United States authorizes the registered organization, branch, or agency to designate its state of location, including by designating its main office, home office, or other comparable office; or