In a sublease agreement, the original tenant (sublessor) stays responsible for the main lease with the landlord. CMHA will provide you with the Housing Assistance Payment (HAP) Contract to sign.You will provide CMHA a copy of your executed lease with your new tenant. A commercial sublease outlines the length of the subtenancy, payment terms, and permitted uses of the property. A sublet, or sublease agreement, adds someone new to an existing lease. Usually the new person (subletter) replaces someone who is moving out. State the rent schedule and amount. State the agreed upon rental amount and when the subtenant must pay it. A sublet, or sublease agreement, adds someone new to an existing lease. Usually the new person (subletter) replaces someone who is moving out.