; and (ii) a business purpose includes promoting common business interests of the group's or association's members or the common economic interests in a given trade or employer community and is not required to be a for-profit activity. (C) (i) For purposes of subparagraph (A)(5)— (I) Employer members of a group or association shall be considered to have a commonality of interest if— (aa) the employers are in the same trade, industry, line of business, or profession; or (bb) each employer has a principal place of business in the same region that does not exceed the boundaries of a single State or a metropolitan area (even if the metropolitan area includes more than one State). (ii) In the case of a group or association that is sponsoring a multiple employer plan and that is an employer member of the group or association, the group or association will be deemed for purposes of paragraph (b)(2)(i)(A) to be in the same trade, industry, line of business, or profession, as applicable, as the other employer members of the group or association. (D) (i) For purposes of subparagraph (A), a working owner of a trade or business without common law employees may qualify as both an employer and as an employee of the trade or business. (ii) For purposes of clause (i), the term working owner means any person who a responsible plan fiduciary reasonably determines is an individual— (I) who has an ownership right of any nature in a trade or business, whether incorporated or unincorporated, including a partner or other self-employed individual; (II) who is earning wages or self-employment income from the trade or business for providing personal services to the trade or business; and (III) who— (aa) works on average at least 20 hours per week or at least 80 hours per month providing personal services to the working owner's trade or business