(a) Costs of storage which may be required to be paid under this chapter shall be assessed in the following manner:
(1) Where a former tenant claims property pursuant to Section 1987, he may be required to pay the reasonable costs of storage for all the personal property remaining on the premises at the termination of the tenancy which are unpaid at the time the claim is made.
(2) Where an owner other than the former tenant claims property pursuant to Section 1987, he may be required to pay the reasonable costs of storage for only the property in which he claims an interest.
(b) In determining the costs to be assessed under subdivision (a), the landlord shall not charge more than one person for the same costs.
(c) If the landlord stores the personal property on the premises, the cost of storage shall be the fair rental value of the space reasonably required for such storage for the term of the storage.