Terms used in this chapter mean:
The principal place of business of a plan sponsor of a benefit plan is determined to be the principal place of business of the association, committee, joint board of trustees, or other similar group of representatives of the parties who establish or maintain the benefit plan that, in lieu of a specific or clear designation of a principal place of business, is determined to be the principal place of business of the employer or employee organization that has the largest investment in the benefit plan in question;
SDCL 58-29C-48