Tenant, following the delivery of the Building D Expansion Space by Landlord and the full and final execution and delivery of the Amendment to which this Exhibit C is attached and all prepaid rental and insurance certificates required under the Lease, as amended hereby, shall have the right to perform alterations and improvements in the Building D Expansion Space (the "Tenant Work"). Notwithstanding the foregoing, Tenant and its contractors shall not have the right to perform the Tenant Work in the Building D Expansion Space unless and until Tenant has complied with all of the terms and conditions of Article 9 of the Original Lease, including, without limitation, approval by Landlord of the final plans and construction documents for the Tenant Work and the contractors to be retained by Tenant to perform such Tenant Work, such approval not to be unreasonably withheld, conditioned or delayed. Tenant shall be solely liable for all costs and expenses associated with or otherwise caused by Tenant's performance and installment of the Tenant Work (including, without limitation, any legal compliance requirements arising outside of the Building D Expansion Space), subject to reimbursement from the Test Fit and Building D Allowances (each as defined below). Tenant hereby acknowledges and agrees that the Property is subject to a collective bargaining or such other similar agreement. If Tenant shall engage any contractor and such contractor or any subcontractor of such contractor shall employ any non-union labor or supplier, Tenant shall be responsible for and hold Landlord harmless from any and all delays, damages and extra costs suffered by Landlord as a result of any dispute with any labor unions concerning the wage, hours, terms or conditions of the employment of any such labor.