19Where two or more competitions of the same registered pool promoter are so conducted that entries in all of them can be effected by a person without completing more than a single coupon or other entry form, the promoter may arrive at the total amount of the stakes in respect of the entries in each competition by—
(a)ascertaining the aggregate total amount of the stakes in respect of the entries in all the competitions ; and
(b)causing the said aggregate total amount to be apportioned among those competitions by reference to the results of an inspection of samples of the completed coupons or forms ;
and if the sampling, inspection and apportionment is such (both as to the process adopted and as to the manner of carrying it out) that the amount apportioned to each competition is not likely to differ from the total amount actually staked therein by more than one per cent. the amount so apportioned to any such competition shall for all the purposes of this Schedule be deemed to be the total amount actually staked in that competitions