This is where the parties lay out clearly who has the responsibilities to do which maintenance and repair work. This is a heavily negotiated point as to which responsibilities will fall to which party. Often large structural improvements will be the responsibility of the landlord, eg. major renovations and HVAC and plumbing that affect more than just the leased premises (other units in the building). Items that are up for discussion include responsibility for keeping the premises tidy, replacement of light bulbs, replacement of glass, locks, door trimmings, and garbage collection. This describes which party is responsible for repairs for a certain level of damage or destruction. It also depends on the cause of the destruction, eg. whether it was caused by an action of the landlord/tenant vs. force majeure. Partial destruction: This is sometimes borne by the tenant. This has to do with the building itself and the premises. This section will lay out the applicable percentage of the damage that constitutes partial destruction (in partial destruction, there is often more flexibility with who will bear the costs than in total destruction). This is a negotiated point with respect to who will determine the quantity of the damage and what caused it. This is often reserved by the landlord. Total destruction: This details what will happen if the whole building is destroyed. Since this has implications for the entire building rather than a particular unit, this will often be the responsibility of the landlord. Effect on rent: If there is some damage or destruction that is not caused by the tenant, there can be a rent adjustment based on the fact that the unit is not in full working condition. There is typically a mechanism for determining this based on the amount of square footage that has been damaged or is rendered unusable. The tenant's preference would be to exit the lease if they are unable to access the business and if the time required to make repair will exceed a certain threshold (e.g. 3 months). Negotiation of this point is usually difficult in commercial leases because a landlord will typically provide almost no opportunity to exit a lease.