This excerpt taken from the DAI 6-K filed Apr 4, 2008.
Exclusion of subscription rights with the use of derivatives
Any claims on the part of shareholders to conclude such option transactions with the Company are excluded analogously to Section 186, Subsection 3 of the German Stock Corporation Act (Aktiengesetz). The specification of the option premium and exercise price as described above prevents shareholders from being disadvantaged in connection with the acquisition of treasury shares with the use of derivatives. As the Company receives or pays a fair market price, the shareholders who are not involved in the option transactions do not lose any value. This is equivalent to the position of shareholders when shares are bought back
through the stock exchange, when not all shareholders can actually sell shares to the Company. The equal treatment of shareholders is therefore ensured also by determining a fair market price, in the same way as with a share buyback through the stock exchange. This also complies with Section 186, Subsection 3, Sentence 4 of the German Stock Corporation Act (Aktiengesetz), which states that the exclusion of subscription rights is justified when the shareholders financial interests are protected.