| LS | Title | From | To | Approval date |
| COM 2 - LS 119 | Harmonization of MIs and SCs for civic alerting purposes | SG2 | ATIS WTSC; TIA TR45.8; 3GPP TSG SA; 3GPP2 TSG-X; | 2011-06-10 |
| COM 2 - LS 81 | Urgent request on global harmonization of MIs and SCs for civic alerting purposes | SG2 | GSMA; 3GPP TSG SA; 3GPP2 TSG-X; ATIS WTSC; TIA TR45.8; | 2010-11-18 |
| COM 2 - LS 88 | Liaison on MI blocks for Civil Alerting | SG2 | 3GPP TSG SA; GSMA; ATIS WTSC; TIA TR45.8; | 2010-11-18 |
| 3GPP2 TSG-X - LS 1 | SG2 LSs on Using MI blocks over 1000 for Civil Alerting and Using 5xx and 9xx MI blocks for Civil Alerting (reply to COM 2-LS 55 & 56) | 3GPP2 TSG-X | SG2; | 2010-03-05 |
| GSMA - LS 1 | Message identifiers for civil alerting purposes (reply to COM 2-LS 55) | GSMA | SG2; 3GPP TSG SA1; | 2010-01-14 |
| 3GPP TSG SA - LS 1 | Message Identifiers for Civil Alerting | 3GPP TSG SA | SG2; 3GPP TSG SA1; GSMA; 3GPP TSG CT; 3GPP TSG CT1; 3GPP2 TSG-X; | 2009-12-10 |
| COM 2 - LS 55 | Liaison to GSMA, 3GPP2 and 3GPP for information and comments, if any, on using 5xx and 9xx MI blocks for Civil Alerting | SG2 | 3GPP2; 3GPP; GSMA; ATIS WTSC; TIA TR45.8; | 2009-11-24 |
| 3GPP TSG SA - LS 6 | LS on Urgent request on global harmonization of MIs and SCs for civic alerting purposes and LS on MI blocks for Civil Alerting | 3GPP TSG SA | SG2; | - |
| TIA TR45.8 - LS 3 | Urgent request on global harmonization of MIs and SCs for civic alerting purposes | TIA TR45.8 | SG2; | - |
| 3GPP2 TSG-X - LS 5 | Urgent request on global harmonization of MIs and SCs for civic alerting purposes | 3GPP2 TSG-X | SG2; | - |
| ATIS WTSC - LS 3 | Urgent request on global harmonization of MIs and SCs for civic alerting purposes | ATIS WTSC | SG2; | - |
