The work to be carried out for the preparation of this statistical operation varies according to two types of units, those subject to a restrictive budget and public accounting, and those subject to the General Business Accounting Plan (private). In the first group, the allocation of expenditure from these units to the different COFOG groups is based on the preparation of expenditure operations in accordance with the methodology established in the ESA, based on the economic classification of the expenditure budget. The functional and programme structure of the budget indicates the purposes and objectives to be achieved with the budgetary resources allocated to the expenditure management centres. The spending programmes for the Budget Settlements are analysed individually in order to ascertain their purpose, for allocation to the relevant COFOG group.
In the case of units subject to the General Business Accounting Plan, the functional classification is carried out on the basis of their main activity, as defined in their statutes and reports. However, in those units that carry out several clearly differentiated activities (for example, in the case of public companies that promote public infrastructure in both education and transport), the allocation of expenditure to different COFOG groups is made according to the information contained in the reports.
Finally, the unit of counterpart of expenditure in interest transactions, current transfers and capital transfers is analysed, so that in sector S.13 each transaction is the sum of the data of each subsector, except for the aforementioned transactions that are consolidated between subsectors.