This excerpt taken from the OPWV DEF 14A filed Oct 26, 2007.
Executive stock ownership guidelines
It is the recommendation of the Board that all executive officers, consistent with their responsibilities to the shareholders of the Company as a whole, hold an equity interest in the Company. Accordingly, each executive officer of the Company should acquire and hold Company stock with a value equivalent to $100,000. Executive officers should satisfy this standard within the later of four years from the date of becoming an executive officer or the adoption of this policy.