.: GS LETTER TO DDG (Establishment), Department of Posts,-Request for Time Factor in Delivering IPPB Services for which Incentives are Not Provided. Ref:- 1. Letter No. 6-14/2019-PBI dated 28/03/2023. 2. Letter No. 6-14/2019-PBI dated 13/11/2023. 3. Letter No. NUPE/110/IPPB transactions Time factor/2024 dated 07/02/2024.