MOD 106: The purpose of this contract modification is to award and definitize the firm fixed price (FFP) launch service for the Imaging X-Ray Polarimetry Explorer (IXPE) mission pursuant to Contract Clause 14.0, entitled Launch Service Task Ordering (LSTO) Procedures. This FFP includes the Falcon 9 Standard Launch Service and Standard Mission Integration and five (5) Mission Unique Services (MUSs). The total firm fixed price for this Launch Service Task Order for all definitized work under Contract Line Item Number 6 (CLIN 6) is $42,049,411.