Single Point of Contact The Contractor must provide, at the request of the Authorized User, a Single Point of Contact (SPOC) regardless of the breadth of the services being provided. The Contractor is required to provide the name and contact telephone numbers (desk, cell phone etc.) of the SPOC. RETAINAGE The Authorized User may retain a percentage of each deliverable payment of no more than twenty-five (25) percent until the acceptance of the complete Implementation. This retainage may be reduced up to 5 percent as described in the SOW, when the Contractor substantially reduces the time required from the timeframes negotiated between the Authorized User and the Contractor. ENHANCEMENTS TO SERVICES When the right is reserved in the RFQ, unanticipated enhancements to the services procured not exceeding a cumulative twenty (20) percent of the Implementation Service cost may be agreed to by the Authorized User. Such inclusion must be included in the Total Cost Evaluation. Such unanticipated enhancements will require a written Authorized User Agreement revision, which for NYS Agency Authorized Users will include an amended Purchase Order. Any changes that will result in exceeding this twenty (20) percent will require a new competitive RFQ. Contractor shall notify the Authorized User in writing when a requested scope change will exceed the cumulative twenty (20) percent total value of the Implementation Services.