Those implementing powers should be exercised on a proposal from the Commission on the total number of persons to be admitted and the specification of the regions or third countries from which admission is to occur fully respecting indications on a voluntary basis made by Member States before the proposal at the High-Level Committee. The Commission should make its proposal for the Union Plan simultaneously with its proposal on the draft Union annual budget in the year before the two-year period in which the Union Plan is to be implemented. The Commission should make its proposal for an amendment to the Union Plan simultaneously with a corresponding proposal on the draft amending budget, where necessary. The Council should aim to adopt the proposal within two months.