When a security instrument posted by a self-insurer applies to claims resulting from injuries and exposures occurring both prior to and on or after the establishment of the guaranty fund, the Bureau may order payment of a portion of the security into a self-insurer account under section 904 (d)(2)(ii) of the act (77 P. S. § 1037.4(d)(2)(ii)) for the payment of compensation on claims resulting from injuries and exposures occurring on or after the establishment of the guaranty fund. The portion of the security retained by the custodian of the security shall be used for the payment of compensation on claims resulting from injuries and exposures occurring prior to the establishment of the guaranty fund.
34 Pa. Code § 125.205