(a) Except as provided by Subsection (b) of this section, a person who violates Section 12.015, 12.017, or 12.504 of this code or a regulation adopted under Section 12.015 of this code commits an offense that is a Class C Parks and Wildlife Code misdemeanor.
(b) If it is shown at the trial of the defendant for a violation of Section 12.017 of this code that he has been convicted within five years before the trial date of a violation of that section, on conviction he shall be punished for a Class B Parks and Wildlife Code misdemeanor.
(c) A person who violates Section 12.505 of this code commits an offense that is a Class A Parks and Wildlife Code misdemeanor.