The flexibility of the accordion or debt increment must be distinguished from a structural adjustment that usually requires the approval of the majority of the union. Borrowing under the incremental facility facility is subject only to the agreement of the participating lenders (provided that the conditions set out in the facility agreement are met). A cleaning requirement is sometimes referred to as „annual cleaning“. Other provisions relating to turnaround periods may include that customers do not receive overdrafts 30 or 60 days a year if they use a revolving line of credit. It may also be necessary to keep the outstanding money in the line of credit within certain limits. For example, the customer may be limited to ensuring that the principal balance does not exceed a set percentage of the total line of credit for at least 30 days of the 12-month period.. . . .