Texas Property Code - PROP § 92.166. Notice of Tenant's Deduction of Repair Costs From Rent

(a) A tenant shall notify the landlord of a rent deduction attributable to the tenant's installing, repairing, changing, replacing, or rekeying of a security device under Section 92.164(a)(1) or 92.165(1) after the landlord's failure to comply with this subchapter. The notice must be given at the time of the reduced rent payment.

(b) Unless otherwise provided in a written lease, a tenant shall provide one duplicate of the key to any key-operated security device installed or rekeyed by the tenant under Section 92.164(a)(1) or 92.165(1) within a reasonable time after the landlord's written request for the key.