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What is the Master International Frequency Register (MIFR)?

The Master International Frequency Register (MIFR) is the ITU database containing all registered frequency assignments. It is also known as the Master Register.

Is the recording in the Master Register a straightforward action?

The recording of a frequency assignment in the Master Register is preceded by various examinations so as to determine the conformity of the concerned frequency assignment with those conditions that could determine its status. Each notice is examined with respect to:

• its conformity with the Table of Frequency Allocations and the other provisions of the RR (regulatory examination); this examination consists of checking that the assignment (frequency, class of station, notified bandwidth) does indeed correspond to an allocation in the Table of Frequency Allocations in Article 5 or the footnotes thereto and, where appropriate, that it complies with other technical or operating conditions laid down in other Articles or Appendices of the RR (power limits, authorized classes of emission, minimum elevation angle);

• its conformity with the procedures relating to coordination with other administrations applicable to the radiocommunication service and the frequency band concerned;

• its conformity with a world or regional allotment or assignment plan and the associated provisions (if the frequency assignment is related to a radiocommunication service which is subject to a plan in the frequency band concerned).

If all the results of these examinations, as applicable, are favourable, the assignment is recorded in the MIFR. Otherwise, the notice is returned to the notifying administration after publication of the finding in the BR IFIC.

What else should the Administration do once the frequency is recorded?

​The recording in the Master Register does not mean an end of activities of the notifying administration in respect to the concerned frequency assignment. The notifying administration should remain in close cooperation with the licensing authority and any change in the characteristics of the concerned assignment has to be notified to the BR, so as to reflect them in the Master Register, if necessary after additional coordination with the administrations of countries concerned. Furthermore, notifying administrations should remain in close contact with the monitoring authority so as to check whether the concerned frequency assignment is operated in compliance with the notified characteristics and whether other elements (e.g., frequency tolerance) are kept within the limits prescribed by the R R. Notifying administrations should also initiate appropriate monitoring programs with a view to detecting any operational or technical irregularities in the operation of frequency assignments from other administrations, and to initiate appropriate actions in this regard, so as to ensure interference-free operation for stations under its jurisdiction.

I have to authorize a frequency assignment in an unplanned band. What should I do?

​In this case, it is necessary to apply either the procedure in Article 11 of the RR, or the procedure in RR9.21 followed by the Article 11 procedure if the band is subject to a coordination procedure.

I have to authorize a frequency assignment in a planned band. What should I do?

There are two possible situations:

  1. there is an assignment recorded in the Plan in question, having the characteristics needed by the applicant which is not brought into use, and the license can be issued to the operator immediately. If so, the assignment is notified under Article 11 of the RR for entry in the Master Register.
  2. there is no assignment recorded in the Plan in question, having the characteristics needed by the applicant. Then the plan modification procedure should be initiated in order to add a new assignment (procedure under Article 4 of the relevant agreement). Before doing so, it will be necessary to find the appropriate frequency and see how it is likely to affect the existing Plan and vice versa. Then coordinate with countries likely to be affected before notifying the Bureau of the assignment. After that, wait for publication of the assignment in Part B of the appropriate Special Section before issuing a license to the operator and completing the procedure for registration of the assignment in the MIFR by notifying it under Article 11 of the RR.
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