Under what circumstance does Penal Code 20.02 not constitute an offense?

The situation described in the correct response emphasizes that Penal Code 20.02, which addresses offenses related to unlawful restraint, does not apply when a person is effecting a lawful arrest. Law enforcement officers have the authority to detain individuals when they are acting within the boundaries of the law, especially in the context of carrying out their duties, such as making an arrest. This lawful action is protected by the legal framework, and thus, it does not constitute an offense under this specific code.

In contrast, the other scenarios involve actions that could potentially lead to unlawful restraint. Detaining someone without cause, moving an individual without their consent, or preventing disorderly conduct could fall under the purview of unlawful restraint if they do not adhere to legal protocols or justifications. Therefore, they illustrate circumstances where the application of Penal Code 20.02 would indeed be relevant, distinguishing them from the lawful actions of arresting an individual under appropriate legal authority.