Delivery times are valid upon written confirmation by the seller of the mock up. Is the seller late with the delivery the buyer has to send a written notice to deliver. After this notice is sent the buyer is in delay for delivery. Seller may sent in parts. Is the seller late the buyer has to set an adequate grace period of minimum six weeks. After this the buyer is allowed to withdraw from the contract. Is the seller not in fault for the delay and was the delay not caused by gross negligence, the seller is not liable for any damages. The seller is not liable for delays caused by third parties in the fulfillment such as government, customs, freight forwarder, transport or other unforeseeable conflict from its suppliers.