Can Project Adjustment SLA rules use document entry as a source?

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We are configuring SLA rules for supplier cost adjustments in PPM, and want to restrict the rules to nonrecoverable tax lines. I am using document entry ("Transaction Document Entry Code" = Nonrecoverable Tax) as a source-based condition, however the rules do not seem to find that condition, so can adjustments use document entry code?

Thanks,

Brian

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