under this Ordinance as regards a
particular quarter (in this
subsection referred to as "the
current quarter") but the licensee
concerned is unable, before the
expiration of the current quarter
or the period of 28 days
commencing on the expiration of
that quarter, to ascertain the
aggregate of the fees or other
charges by reference to which the
amount due on account of the
royalty as respects the current
quarter is to be determined, the
licensee shall, within the period
of 30 days immediately following
the expiration of the current
quarter, pay to the Director of
Accounting Services a sum the