A particular feature of the electoral campaign funding rules, as revised in 2015, is the requirement for electoral contestants to open an electoral fund (i.e. a special bank account) through which all financial transactions must be conducted; see Article 38(2) of the EC. The 2013 Joint Opinion had welcomed this approach, which facilitates transparency and oversight over campaign expenditures, but it had also noted that the existence of such a fund "does not guarantee that no transactions will by-pass the fund and that the expenditure ceilings will not be violated. For this reason, as an additional measure, a more comprehensive approach to include details of the campaign period, campaign definition and campaign expenditure ceiling could be used, stipulating by law that all transactions apart from regular party operations (office, salaries of the permanent staff) are campaign expenditures and be administered through the fund. ” This proposal has apparently not been introduced and should again be taken into consideration by the authorities.