definiens: means : ( 1 ) with respect to any such Lead in a particular Program, the period from the date of identification of such Lead until the earlier of ( A ) expiration of the Early Development Program Term for such Program or, if none, the Research Program for such Program or ( 8) when development of such Lead is terminated ; or ( 2 ) with respect to any such Follow - On Compound in a particular Program, the period from the date of its determination as such by the JSC following nomination by [COMPANY] until the earliest of : ( A ) the date on which it is determined whether the Follow - On EXECUTION VERSION -95 - Compound has achieved Other Product Candidate PoC ; ( B ) when development of such Follow­On Compound is terminated ; or ( C ) if such Follow - On Compound becomes a Product Candidate ( i.e., upon exercise of the applicable Program Option by [COMPANY] ), three ( 3 ) years after such Follow­On Compound reaches(d ) the Candidate Selection Stage, unless [COMPANY] ( or, in the conduct of [COMPANY] Post - Exercise Activities, [COMPANY] ) is then conducting Clinical Trials of such Follow­On Compound, in which case until such time as neither [COMPANY] nor [COMPANY] is conducting Clinical Trials of such Follow - On Compound ; provided that, for clarity, a Collaboration Compound determined to be a Follow - On Compound prior to reaching the Candidate Selection Stage that does not continue to qualify as a Follow - On Compound upon reaching the Candidate Selection Stage shall, upon reaching the Candidate Selection Stage, cease to have an MoA Exclusi vity Period