A covenant to yield up premises in good and substantial repair may require a tenant to remove tenant's fixtures whose presence renders the premises not in a reasonably lettable condition, even absent an express decommissioning clause. This obligation arises from the proper construction of the yield-up covenant, not from an implied term. However, there is no general obligation on a tenant to remove all tenant's fixtures, and the right to remove remains elective at common law. Landlords seeking certainty should include express decommissioning clauses or attach conditions to consent to install fixtures.
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