by Client fix its internal business purposes only. 19.6 In some circumstances Client may be prohibited or restricted under Applicable Law from receiving materials or services of the type referred to in clause 19.4 and 19.5 or permitted to receive such materials or services only if it pays for them out of its own resources or certain procedures are followed. Client undertakes to determine whether it is able by reason of Applicable Law to accept such materials or services on the terms on which they are provided and to notify DB promptly if it is considers that it is unable to do so. Client agrees that DB does not make any representation or undertaking in relation to whether such materials or services can be received by Client, free of charge or otherwise. 20. PORTFOLIO TRADING 20.1 DB may execute blind principal portfolio trades, which are trades executed by DB on a principal basis in which neither the direction of the trade nor the identity of the portfolio financial instruments are revealed to DB until after the trade has been awarded to DB. They are to be distinguished from disclosed principal portfolio trades where the direction of the trade and the financial instruments involved are revealed to DB before the trade is awarded. 20.2 DB personnel who have knowledge of the contents of Client's portfolio trade order, be it a blind principal portfolio trade or a disclosed principal portfolio trade, will not deal in the financial instruments specified in Client's order in the time between Client placing the order for the portfolio trade with DB and the strike time of the portfolio trade, unless DB has either obtained Client's prior consent or DB is able to demonstrate that it has provided fair treatment to Client. 20.3 In relation to blind principal portfolio trades only, DB may, subject to clause 20.2, deal in financial instruments (or related instruments) which ultimately form part of Client's portfolio trade in