Okla. Stat. tit. 21, § 21-1835.5: Trespass - Prima facie evidence

It shall be prima facie evidence that a person is on land for a

recreational use if the person is on the land of another without

other explanation.

1. The absence of posting shall not by itself be sufficient to

imply consent.

2. Consent shall not be implied if the land is posted.

3. It shall be the obligation of the recreational user to

establish implied consent as an affirmative defense.