improvement in the accounting and billing systems of hospitals, through: finalising the introduction of double-entry accrual accounting systems in all hospitals; the use of the uniform coding system and a common registry for medical supplies; the calculation of stocks and flows of medical supplies in all the hospitals using the uniform coding system for medical supplies; the collection of co-payments from patients in all National Health System facilities; and the timely invoicing of treatment costs (no later than 2 months) to Greek social security funds, other Member States and private health insurers; and ensure that at least 50 % ...[+++]of the volume of medicines used by public hospitals by the end of 2011 is composed of generics and off-patent medicines by making it compulsory for all public hospitals to procure pharmaceutical products by active substance;

37. .Notes the efforts made by Commission services during 2006 to ensure the completeness and accuracy of the registration of new pre-financing payments as well as of new open invoices and cost statements, and of cut-offs;

35. Notes the efforts made by the Commission's services during 2006 to ensure the completeness and accuracy of the registration of new pre-financing payments, of new open invoices and cost statements, and of cut-offs;

24. Expresses nonetheless its concern at the ECA's observations regarding errors identified in amounts registered in the accounting system as invoices or cost statements and pre-financing, which have the effect of overstating the amounts payable by some EUR 201 million and the total amount of long and short term pre-financing by some EUR 656 million; regrets in particular weaknesses in the accounting systems of certain Directorates-General, which still endanger the quality of financial information (in particular for cut-off and employee benefits) and lead to a number of corrections after the presentation of the provisional accounts;

26. Expresses nonetheless its concern at the ECA 's observations regarding errors identified in amounts registered in the accounting system as invoices/cost statements and pre-financing which have the effect of overstating the accounts payable by some EUR 201 million and the total amount of long and short term pre-financing by some EUR 656 million; regrets in particular weaknesses in the accounting systems of certain institutions and Directorates-General of the Commission which still put at risk the quality of financial information (in particular for cut-off and employee benefits) leading to a number of corrections after the presentatio ...[+++]n of the provisional accounts;

It is basically signing off invoices.