9.—(1) Dutiable goods shall not be deposited in an excise warehouse or kept in an excise warehouse unless the occupier of that warehouse–
(a)is an authorized warehousekeeper, and
(b)is permitted by the terms of his approval to hold dutiable goods of that class or description.
(2) Relevant goods shall not be kept in an excise warehouse for more than the initial period beginning with their deposit in that warehouse unless the owner of those goods–
(a)is not a revenue trader, or
(b)is the authorized warehousekeeper, or
(c)is a registered owner who resides or has a business establishment or other fixed establishment in the United Kingdom, or
(d)has a duty representative acting as his agent in respect of those goods.
(3) Relevant goods shall not be sold whilst they are being kept in an excise warehouse unless the seller, or if the seller has a duty representative that representative, gives notice of the sale to the authorized warehousekeeper.