A/RES/61/264 (c) Differentiated levels of charge as a percentage of salary costs to be applied against different funding sources, including the regular budget, peacekeeping and extrabudgetary funds, taking into account, to the extent possible, different career patterns of staff financed against those sources, that would be sufficient to finance after-service health insurance liabilities in a predictable manner without building up a reserve; (d) The option of partial funding of the liability; (e) The option of full funding over a longer period than envisaged in the report of the Secretary-General; (f) The proportion of the current accrued liability which relates to the different categories of beneficiaries from all funding sources, namely, current retirees, active employees currently eligible to retire, and active employees not eligible to retire, as well as multiple options to address those after-service health insurance liabilities; (g) An after-service health insurance reserve fund and its investment strategies; 16. Stresses the importance of addressing this matter further and decides, pending the validation of the accrued after-service health insurance liabilities and auditing by the Board of Auditors, to revert to it, as a matter of priority, at its sixtythird session. 93rd plenary meeting 4 April 2007 3