31 Pa. Code § 89.473
(a) Legitimacy of underlying plan. Insurance companies writing stop-loss coverage shall exercise due diligence in ascertaining the legitimacy of the underlying plan before issuing coverage. This includes ensuring that:
(b) Pooling of risk prohibited.
(1) An underlying plan that aggregates multiple employers’ funds into an account, trust or other funding vehicle shall be capable of demonstrating that there is no pooling of risk between employers in any manner, including one or more of the following:
The provisions of this § 89.473 adopted September 25, 1992, effective September 26, 1992, 22 Pa.B. 4785.