2. However, the following events are not renegotiations:
- a. The addition or return of property in a multi-item agreement or the substitution of the leased property, if in either case the lease payment is not changed by more than twenty-five percent.
- b. A deferral or extension of one or more lease payments, or portions of a lease payment.
- c. A reduction in charges in the agreement.
- d. A lease or agreement involved in a court proceeding.