EBU Single Rulebook Q&A 14 November 2019 2019_5002 Tied credit intermediary that represents a number of creditors or groups which does not represent the majority of the market

What type of criteria should a tied credit intermediary abide to in order not to go beyond the legal limit of “the majority of the market” when establishing relationships with creditors? How should this majority be calculated and how many times do intermediaries need to update this information in order to remain compliant?