1. Unit cost shall cover all or certain specific categories of reimbursable expenditure which are clearly identified in advance by reference to an amount per unit.
2. Lump sums shall cover, in global terms, certain expenditure necessary for carrying out a specific activity of the European political party. Lump sums shall be used only in combination with other forms of contributions.
3. Flat-rate financing shall cover specific categories of reimbursable expenditure which are clearly identified in advance by applying a percentage.
4. Where lump sums, flat-rate financing or unit costs are used, they shall be defined in the call for contributions with their respective amounts and rates, where applicable. The call for contributions shall also contain a description of the methods for determining lump sums, flat-rate financing or unit costs, which shall be based on objective means such as statistical data, certified or auditable historical data of the European political parties or their usual cost accounting practices. The contribution agreement or decision shall include provisions that allow verifying that the conditions for the award of lump sums, flat-rate financing or unit costs have been complied with.]