(a) A person commits an offense if the person begins to construct, alter, repair, or extend an on-site sewage disposal system owned by another person before the owner of the system obtains a permit to construct, alter, repair, or extend the on-site sewage disposal system as required by Subchapter D, Chapter 366, Health and Safety Code.
(b) Except as provided by this subsection, an offense under this section is a Class C misdemeanor. If it is shown on the trial of the defendant that the defendant has previously been convicted of an offense under this section, the offense is punishable under Section 7.187(1)(A) or Section 7.187(2)(A) or both.