Okla. Stat. tit. 22, § 22-504: Demurrer to indictment or information

The defendant may demur to the indictment or information when it

appears upon the face thereof either:

1. That the grand jury by which an indictment was found had no

legal authority to inquire into the offense charged, by reason of

its not being within the legal jurisdiction of the county.

2. That it does not substantially conform to the requirements

of this chapter.

3. That more than one offense is charged in the indictment or

information.

4. That the facts stated do not constitute a public offense.

5. That the indictment or information contains any matter

which, if true, would constitute a legal justification or excuse of

the offense charged, or other legal bar to the prosecution.