How to process requisition lines to a contract type agreement class with no lines?

Summary:

How can I process requisition lines to a contract type that would produce a contract purchase agreement (CPA)?

From the Contract Type field, it only lists contract types that were set up with an Agreement class with "Allow lines". Can I process requisition lines to a contract type with an Agreement class without lines (Allow lines feature unchecked)?

When staging the requisition lines, how can I get the Contract Type field to list contract types without lines to process a contract that can fulfill with a CPA?

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