| 1st | Efficiency Improvement such as withdrawal and reallocation of radio frequencies, conversion of technical modes etc. |
| Preparation of new service, development of equipment, etc. |
| 2nd | Suspension of the new authorization, Implementation (possibility) notice of efficiency improvement, Make execution plan of efficiency improvement, Stakeholder consultation etc. |
| Suspension of the new investment in existing facilities, Relocation of subscribers, Preparation of equipment development etc. |
| 3rd | Monitoring new demand and discovery of radio frequencies, Promoting efficiency improvement in case of demand occur |
| Demand expression of new radio frequencies, Promotion of new technology and service introduction etc. |
| 4th | Monitoring the new demand and usage of radio frequencies, Excavation of spectrum |
| Sustainable use |