We want to derieve accounting segment in AR invoice based on Project Classification code

Summary:

We want to derieve accounting segment in AR invoice based on Project Classification code, Project information are not available on AR invoices created via Contracts
Is there a way to create an SLA rule based on project classification, We have contracts associated with multiple projects and these projects are tied to their respective proejct classifications and on basis of these classifications we need to derieve the cost centres for revenue in AR

Any suggestion will be much appreciated.

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