Ability write PO and BPA approval rule logic based on supplier item code

Summary:

We currently have EDI suppliers who require supplier item number as a mandatory value. We would like to build auto rejection rule in the BPA and PO so that POs for specific suppliers without supplier item number in the lines gets auto rejected

Please could you let me know if there is BPM attribute that we can use for this purpose in BPA and PO approval rules.

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26A

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