(1)(a) sexual intercourse by force or compulsion

(b) the victim is under 12

(c) the victim is under 16 & is the subject's sibling, step-sibling, child or step-child

(d) the victim is incapable of consent by reason of mental incapacitation, physical helplessness or incapability of appraising the nature of the victim's conduct.

• 163.325 (ignorance or mistake as a defense) applies