This excerpt taken from the SM DEF 14A filed Apr 10, 2007.
A quorum of stockholders is necessary to hold a valid meeting. A quorum will exist if stockholders of one-third of the outstanding shares of common stock are present at the meeting in person or by proxy. Abstentions and broker non-votes count as present for establishing a quorum. A broker non-vote occurs on a matter when a broker is not permitted to vote on that matter without instruction from the beneficial owner of the shares and no instruction is given. Shares held by St. Mary in its treasury are not entitled to vote and do not count toward a quorum. If a quorum is not present, the meeting may be adjourned until a quorum is obtained.