(a) Notwithstanding any other law and except as provided by Subsection (c), a municipality, county, or emergency services district may not enact an ordinance, bylaw, order, building code, or rule requiring the installation of a multipurpose residential fire protection sprinkler system or any other fire protection sprinkler system in a new or existing one- or two-family dwelling.
(b) A municipality, county, or emergency services district may adopt an ordinance, bylaw, order, building code, or rule allowing a multipurpose residential fire protection sprinkler system specialist or other contractor to offer, for a fee, the installation of a fire protection sprinkler system in a new one- or two-family dwelling.

(c) Subsection (a) does not apply to:
(1) a municipality that has enacted an ordinance, bylaw, order, building code, or rule requiring the installation of a multipurpose residential fire protection sprinkler system or any other fire protection sprinkler system in a new or existing one- or two-family dwelling on or before January 1, 2009; or
(2) an emergency services district:
(A) that before February 1, 2013, has adopted a fire code, fire code amendments, or other requirements in conflict with Subsection (a); and
(B) whose territory is located:
(i) in or adjacent to a general law municipality with a population of less than 4,000 that is served by a water control and improvement district governed by Chapter 51, Water Code; and
(ii) in a county that has a population of more than 1.2 million and is adjacent to a county with a population of more than 600,000.