definiens: ) shal l mean the period ending on the effective date of termination of MTEM ’s Co - Development Option as prov ided in the preceding clauses ( a ), ( b ) and ( c ) ( i.e., the effective date of termination referenced in clause ( a ) or the expiration of the [ * * * ] perio d referenced in clause ( b ) or clause ( c ), as applicab le ) . MTEM shall continue to be responsible for [ * * * ] of the Co - Development Costs incurred prior to the e nd of the Co - Development Termination Notice Period in accordance with this Section 6.5.2 and, i f MTEM provides the Co - Development Termination Notice before completion of the Early Stage Program, MTEM shall continue to be responsible for [ * * * ] of the Co - Development Costs with respect to the Ear ly Stage Program in accordance with Section 6.5.1