[...] Complying presentation means a presentation that is in accordance with the terms and conditions of the credit, the applicable provisions of these rules and international standard banking practice. [...]
a. A credit by its nature is a separate transaction from the sale or other contract on which it may be based. Banks are in no way concerned with or bound by such contract, even if any reference whatsoever to it is included in the credit. Consequently, the undertaking of a bank to honour, to negotiate or to fulfil any other obligation under the credit is not subject to claims or defences by the applicant resulting from its relationships with the issuing bank or the beneficiary.
A beneficiary can in no case avail itself of the contractual relationships existing between banks or between the applicant and the issuing bank. [...]
a. A nominated bank acting on its nomination, a confirming bank, if any, and the issuing bank must examine a presentation to determine, on the basis of the documents alone, whether or not the documents appear on their face to constitute a complying presentation.
a. When a nominated bank acting on its nomination, a confirming bank, if any, or the issuing bank determines that a presentation does not comply, it may refuse to honour or negotiate.