Charges and Expenses a.If the collection instruction specifies that collection charges and/or expenses are to be ofr account of the drawee and the drawee refuses to pay them, the presenting bank may deliver the document(s) against payment or acceptance or on other terms and conditions as the case may be, without collecting charges and/or expenses,unless sub-article 21 (b) applies. Whenever collection charges and/or expenses are so waived they will be for the account of the party from whom the collection was received and may be deducted from the proceeds. b.Where the collection instruction expressly states that charges and/or expenses may not be waived and the drawee refuses to pay such charges and/or expenses, the presenting bank will not deliver documents and will not be responsible for any consequence arising out of any delay in the delivery of the document(s). When payment of collection charges and/or expenses has been refused the presenting bank must inform by telecommunication or, if that is not possible, by other expeditious means without delay the bank from which the collection instruction was received. c.In all cases where in the express terms of a collection instruction or under these Rules, disbursements and/or expenses and/or collection charges are to be borne by the principal, the collecting bank(s) shall be entitled to recover promptly outlays in respect of disbursements,expenses and charges from the bank form which the collection instruction ws received, and the remitting bank shall be entitled to recover promptly from the principal any amount so paid out by it,together with its own disbursements,expenses and charges,regardless of the fate of the collection. d.Banks reserve the right to demand payment of charges and/or expenses in advance from the party from whom the collection instruction was received, to cover costs in attempting to carry out any instructions, and pending receipt of such payment also reserve the right not to carry out such instructions.