definiens: , asfurther defined in the Services Agreement ) ; WHEREAS, the Parties entered into the First Amendment to the Original Services Agreementeffective December 21, 2017 ( the ) to provide for Atara ’s [ * ] certain Services atManufacturer ’s facility ; WHEREAS, the Parties entered into the Second Amendment to the Original Services Agreementeffective May 4, 2018, and subsequently amended and restated effective November 4, 2018 ( collectively, the ) to further revise certain terms of the ServicesAgreement ; WHEREAS, the Parties entered into the Third Amendment to the Original Services Agreementeffective June 28, 2019 ( the ) to further revise certain terms of the ServicesAgreement ; WHEREAS, the Parties entered into the Fourth Amendment to the Original Services Agreement [ * ] effective October 1, 2019 ( the ) to further revise certain terms of the ServicesAgreement ; WHEREAS, the Original Services Agreement, as amended by the First Amendment, theAmended and Restated Second Amendment, the Third Amendment, and the Fourth Amendment arecollectively referred to in this Fifth Amendment as the ; WHEREAS, the Parties have agreed to further amend the Services Agreement to extend theTerm of the Services Agreement and revise certain other terms of the Services Agreement ; and WHEREAS, Section 15.7 of the Services Agreement provides that the Services Agreement mayonly be modified by a writing signed by authorized representatives of each Party