6.—(1) Every–
(a)direct seller; and
(b)wholesale producer,
shall register their quota with the Scottish Ministers.
(2) Each purchaser shall maintain, in respect of all wholesale producers whose register entries include the name of that purchaser on the list referred to in regulation 4(4)(e)–
(a)a register corresponding to that maintained by the Scottish Ministers under regulation 4(3) in respect of that part of the purchaser quota attributable to each of those wholesale producers;
(b)a register of particulars of deliveries from each of those wholesale producers to that purchaser; and
(c)the information required by paragraphs 2 to 4 of Article 24 of the Commission Regulation (which concern the records required in connection with levy assessment).
(3) Each person who holds registered wholesale quota, including any wholesale producer who has temporarily ceased or who intends temporarily to cease making deliveries, shall register that quota with a purchaser.
(4) A wholesale producer may supply milk only to a purchaser.
(5) Each purchaser shall maintain a system approved by the Scottish Ministers for–
(a)sampling the milk of each wholesale producer whose register entries include the name of that purchaser on the list referred to in regulation 4(4)(e); and
(b)determining its fat content.
(6) Each purchaser shall amend the register referred to in paragraph (2)(a) on each occasion when the purchaser is notified by the Scottish Ministers that the equivalent register maintained by the Scottish Ministers has been amended in relation to wholesale producers registered in the register of that purchaser.