This excerpt taken from the ZINC DEF 14A filed Apr 14, 2008.
Who can attend the meeting?
Subject to space availability, all stockholders as of the Record Date, or their duly appointed proxies, may attend the Annual Meeting, and each may be accompanied by one guest. Registration will begin at 10:30 local time, and seating will begin at 10:45 local time. If you attend, please note that you may be asked to present proof of your stockholdings and valid identification. Cameras (including cell phones with photographic capabilities) and recording devices will not be permitted at the meeting.
Please note that if you hold your shares in street name (that is, through a broker, bank or other nominee), you will need to bring a copy of a brokerage statement reflecting your stock ownership as of the Record Date and check in at the registration desk at the meeting.
Please let us know if you plan to attend the meeting by marking the appropriate box on the enclosed proxy card.