Under financial regulation 5.4, contributions and advances are considered due and payable within 30 days of the receipt of the assessment, or as of the first day of the calendar year to which they relate, whichever is the later.
财务条例5.4规定，会费和预缴款项应在接到摊款通知之日起三十天内，或在与其有关历年的第一天付清，以较晚的日期为准。