A commercial lease has almost no default rules behind it. The Illinois statute supplies a five-day notice for unpaid rent and a ten-day notice for any other breach, and it bars a landlord from changing the locks without a court order. Everything else, the pass-throughs, the repair line, the consent standard for a sublease, exists only if the lease says it does.
The operating-expense clause is where a landlord earns or loses the deal after signing. Which capital items pass through CAM, how the management fee is computed, and how long the tenant has to audit the reconciliation before it is deemed accepted decide more over a ten-year term than the base rent did, and under many leases a landlord that misses its own reconciliation deadline waives the shortfall.
Condominium and community associations run on a second rulebook, the Illinois Condominium Property Act and the declaration, where a fine needs notice and a hearing first and a board that skips a step loses the enforcement. We act for landlords, tenants, and boards, and we calendar the dates the documents create, because a lease administers nothing on its own.