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.