31 Pa. Code § 23.61
No solicitation subject to this subchapter shall be made by any person other than the management of an insurer unless, at least five business days beforehand (or any shorter period which the Insurance Department may authorize upon a showing of good cause), there has been filed with the Insurance Department by or on behalf of each participant in the solicitation, a statement in duplicate containing the information specified by Schedule B, as described in Subchapter F (relating to required information for Schedules A and B), and a copy of any material proposed to be distributed to security holders in the furtherance of such solicitation. If preliminary copies of any materials are filed, distribution to security holders shall be deferred until the comments of the Insurance Department have been received and complied with.
31 Pa. Code § 23.61
This section cited in 31 Pa. Code § 23.64 (relating to information as to additional participants).