17. Producers who are online marketplace operators must—
(a)where the producers are small producers, keep records of the information set out in paragraphs 18 and 19, and provide a description of the methodology they use to collate that information to NRW;
(b)where the producers are large producers, keep records of, and report on, the information set out in paragraphs 18 and 19, and provide a description of the methodology they use to collate that information to NRW.
18. The weight in kilograms of packaging in each packaging category the producer has supplied during the relevant period.
19. The weight in kilograms of household packaging in each packaging category the producer has supplied during the relevant period.