'Has a Duty' Test
To determine if "shall" is being used correctly in a contract, Ken Adams proposes the "has a duty" test. This simple yet effective method involves replacing "shall" with "has [or have] a duty to" in the sentence. If the sentence still makes sense after this substitution, then "shall" is being used appropriately to express an obligation.
For example:
Original: "The Seller shall deliver the goods by June 1st." Test: "The Seller has a duty to deliver the goods by June 1st." This test helps drafters ensure consistency and clarity in their use of "shall" throughout a contract, reducing the risk of ambiguity or misinterpretation. It also serves as a practical tool for editors and reviewers to quickly identify instances where "shall" might be misused or unnecessary.
As Ken has pointed out to me “the nature of the test depends on the semantic context. At one extreme, it's really easy: "This agreement shall be governed ..." At the other extreme, it can get subtle.” MSCD has a section about that.