Here's the link to FIFA regulations covering compensation https://resources.fifa.com/mm/document/affederation/administration/02/88/90/97/circularno.1582-regulationsonthestatusandtransferofplayerscategorisationofclubsregistrationperiodsandeligibility_neutral.pdf And here's the reference to Derby County category 1 https://www.dcfc.co.uk/news/2016/07/derby-retain-category-one-academy-status