The Joint Committee makes these decisions by mutual agreement . . . . The review of fishing opportunities by mutual agreement Review of fishing opportunities and technical measures by mutual agreement may be amended if the parties reach an agreement in writing on this matter. Frequent short phrases: 1-400, 401-800, 801-1200, Plus Parties may at any time amend this Agreement in writing by mutual agreement. modalities of mutual consultation between the relevant authorities. any other subject defined by mutual agreement between the two parties. This agreement may be amended and extended at any time, with the agreement of the contracting parties. Common words: 1-300, 301-600, 601-900, Plus.