8. For sampling seed lots in containers holding less than 15 kilograms of seed, a 100 kilogram weight of seed shall be taken as the basic unit and the small containers shall be combined to form sampling units not exceeding this weight (for example 9 packages of 10 kilograms, 20 packages of 5 kilograms) and for sampling purposes each unit shall be regarded as one container and the sampling procedures prescribed in paragraphs 6 and 7 of this Part of this Schedule shall be used.