Whether to Use Language of Discretion or Language of Prohibition to Express an Action that Is Subject to Consent
The following sentences express the same meaning: If it receives Acme’s prior written consent, the Vendor may cause one or more subcontractors to perform Services. Unless it receives Acme’s prior written consent, the Vendor shall not cause any subcontractors to perform Services. Which would you be inclined to use? Would your answer vary depending on which party you represent?