| Letter No. | Date | Subject | |
|---|---|---|---|
| 2023 | |||
| 2012/Sig/SF/2(Policy) | 20.07.2023 | Commissioning of New works or Alteration to existing signalling installation. | |
| 2016 | |||
| 2012/Sig/SF/2(Policy) | 30.12.2016 | Commissioning of EI/PI/RRI. | |
| 2010 | |||
| 2008/RE/161/15 (S&T) | 26.08.2010 | Provision of Panel Interlocking. | |
| 2007 | |||
| 2002/Sig/PI/1 | 14.03.2007 | Provision of Panel Interlocking. | |
| 2006 | |||
| 2003/SIG/G/5/Pt. | 30.01.2006 | Policy on type of equipment to be provided for interlocking at Block Stations. | |
| Source : Ministry of Railways (Railway Board) CMS Team Last Reviewed on: 03-10-2023 | |||