This excerpt taken from the PRVT 8-K filed Nov 3, 2009.
Section 3.6 Restrictions on Transfer
The Holders shall not Transfer any Exchangeable Shares (or any other securities of Corporation received on account of the Holders ownership of Exchangeable Shares) unless such Transfer is (a) a Transfer of Exchangeable Shares by the Holders pursuant to the terms of this Agreement or the Exchangeable Share Provisions or (b) is a Transfer approved by the Board of Directors, which approval may be withheld for any reason. As used above, the term Transfer includes the making of any sale, exchange, assignment, sale, hypothecation, gift, grant of security interest, pledge, mortgage or other direct or indirect disposition or encumbrance, or any contract therefor, any trust or other agreement or arrangement with
respect to any other beneficial interest in such securities, the creation of any other claim thereto or any other transfer or disposition whatsoever, whether voluntary or involuntary, affecting the right, title, interest or possession in or to such securities.