(1) A notification of a security interest in receivables or a payment instruction is effective when received by the debtor of receivables, if it reasonably identifies the encumbered receivables and the secured creditor and is in a language that is reasonably expected to inform the debtor of receivables about its contents.
(2) It is sufficient if a notification of the security interest or a payment instruction is in the language of the contract giving rise to the receivable.
(3) Encumbered receivables covered in a notification or payment instruction may include receivables that arise after notification.