Final answer:
The Commercial Broker Lien Act covers vacant land, farmland, 4-unit apartment building, and warehouse, granting commercial brokers the right to file a lien for earned fees.
Step-by-step explanation:
The Commercial Broker Lien Act covers all of the following properties: vacant land, farmland, 4-unit apartment building, and warehouse.
This act provides protection to commercial brokers who have facilitated the sale, lease, or exchange of these properties by granting them a lien against the property to secure payment of earned brokerage fees.
For example, if a commercial broker assisted in selling a warehouse, the broker may file a lien against the warehouse to ensure they are paid their commission for the sale.