No policy may be issued under § 58-16-12 to insure employees of any employer whose eligibility to participate in the fund as an employer arises out of considerations directly related to the employer being a commercial correspondent or business client or patron of another employer, except where such other employer exercises substantial control over the business operations of the participating employers.

Source: SL 1966, ch 111, ch 24, § 1 (4) (a).