Common use of Reverter Clause in Contracts

Reverter. Unless, before the expiration or termination -------- of the Option Period for a given ZSS, NN exercises the RoW Option for such ZSS (pursuant to SECTION 4.2), all Commercialization Rights, in RoW, in all fields, for Products based on Zid Embodiments in such ZSS shall revert to ZGI. Similarly, unless, before the expiration or termination of the Option Period for a given ZSS, NN exercises the BC Option for such ZSS (pursuant to SECTION 4.2), all Commercialization Rights worldwide in the BC Field, for Products based on Zid Embodiments in such ZSS shall revert to ZGI. As of June 16, 2000, after NN's analysis of [*], [*] and TACI, NN has determined that all rights in the ZSSs for [*], [*] and TACI have reverted to ZGI. The following SUBSECTION 4.1.6. shall be added.