31 Pa. Code § 21.36
Any acquisition or disposition of an equity security involved in the deposit of the security under, or the withdrawal of the security from, a voting trust or deposit agreement, and the acquisition or disposition in connection therewith of the certificate representing the security, shall be exempt from the operation of section 302.1(2) of the act (40 P. S. § 422.1(2)), if substantially all of the assets held under the voting trust or deposit agreement immediately after the deposit or immediately prior to the withdrawal, as the case may be, consisted of equity securities of the same class as the security deposited or withdrawn, provided that this section does not apply to the extent that there shall have been either a purchase of an equity security of the class deposited and a sale or any certificate representing an equity security of the class, or a sale of an equity security of the class deposited and purchase of any certificate representing an equity security of the class (otherwise than in a transaction involved in the deposit or withdrawal or in a transaction exempted by another provision of the regulations under section 302.1(2) of the act within a period of less than 6 months, which includes the date of the deposit or withdrawal.
31 Pa. Code § 21.36