A. Rape by instrumentation is an act within or without the bonds of matrimony in which any inanimate object or any part of the human body, not amounting to sexual intercourse is used in the carnal knowledge of another person without his or her consent and penetration of the anus or vagina occurs to that person.
B. Provided, further, that at least one of the circumstances specified in Section 1111 of this title has been met; further, where the victim is at least sixteen (16) years of age and is less than twenty (20) years of age and is a student, or under the legal custody or supervision of any public or private elementary or secondary school, junior high or high school, or public vocational school, and engages in conduct prohibited by this section of law with a person who is eighteen (18) years of age or older and is an employee of the same school system, or where the victim is under the legal custody or supervision of a state or federal agency, county, municipal or a political subdivision and engages in conduct prohibited by this section of law with a federal, state, county, municipal or political subdivision employee or an employee of a contractor of the state, the federal government, a county, a municipality or a political subdivision that exercises authority over the victim, consent shall not be an element of the crime.
C. Provided, further, that at least one of the circumstances specified in Section 1111 of this title has been met; further, where the victim is nineteen (19) years of age or younger and in the legal custody of a state agency, federal agency or tribal court and engages in conduct prohibited by this section of law with a foster parent or foster parent applicant.
D. Except for persons sentenced to life or life without parole, any person sentenced to imprisonment for two (2) years or more for a violation of this section shall be required to serve a term of post-imprisonment supervision pursuant to subparagraph f of paragraph 1 of subsection A of Section 991a of Title 22 of the Oklahoma Statutes under conditions determined by the Department of Corrections. The jury shall be advised that the mandatory post-imprisonment supervision shall be in addition to the actual imprisonment.