When can no further changes be made to a Purchase Requisition?

The correct answer is that no further changes can be made to a Purchase Requisition once L4 certification is completed. At this stage, the Purchase Requisition has passed through several levels of scrutiny and approvals, including L1, L2, and L3 validations. The L4 certification indicates that the requisition has been fully vetted and is ready to move forward with the procurement process.

Once the L4 certification has been achieved, the requisition is considered final and binding. This is crucial in maintaining the integrity of the procurement process, ensuring that all necessary approvals have been accounted for, and preventing any alterations that could disrupt budgeting or contractual obligations. Therefore, when L4 certification is completed, it signifies a formal acceptance of the requisition as is, allowing no further modifications, as it is now set to be processed for purchasing.