(a) In this section, "national model code" has the meaning assigned by Section 214.217.
(b) Except as provided by Subsection (c), the governing body of a municipality with a population of more than 100,000 that adopts an ordinance or national model code provision that is intended to govern the construction, renovation, use, or maintenance of buildings and building systems in the municipality shall delay implementing and enforcing the ordinance or code provision for at least 30 days after final adoption to permit persons affected to comply with the ordinance or code provision.
(c) If a delay in implementing or enforcing the ordinance or code provision would cause imminent harm to the health or safety of the public, the municipality may enforce the ordinance or code provision immediately on the effective date of the ordinance or code provision.