(a) At a tenant's request made at any time, a landlord, at the tenant's expense, shall install:
(1) a keyed dead bolt on an exterior door if the door has:
(A) a doorknob lock but not a keyed dead bolt; or
(B) a keyless bolting device but not a keyed dead bolt or doorknob lock; and
(2) a sliding door handle latch or sliding door security bar if the door is an exterior sliding glass door without a sliding door handle latch or sliding door security bar.
(b) At a tenant's request made before January 1, 1995, a landlord, at the tenant's expense, shall install on an exterior door of a dwelling constructed before September 1, 1993:
(1) a keyless bolting device if the door does not have a keyless bolting device; and
(2) a door viewer if the door does not have a door viewer.
(c) If a security device required by Section 92.153 to be installed on or after January 1, 1995, without necessity of a tenant's request has not been installed by the landlord, the tenant may request the landlord to immediately install it, and the landlord shall immediately install it at the landlord's expense.
Official text of the Texas Property Code as published by the Texas Legislative Council.