Apart from their great biological significance, all of the lakes have considerable commercial fish stock, which requires particular management. The plans are therefore supposed to be submitted to MoAFWE prior to the issuing of a license, and MoAFWE can request opinions from relevant scientific institutions. .Sport fishing on rivers is also on a concession basis, but arrangements are made directly with the SFA, again on a five-year basis. Both commercial companies and SFAs have to submit a five-year plan for protection, improvement, and responsible usage of the relevant fish stock.