(1) In any civil action for damages by an alleged victim which alleges damages resulting from a sexual assault on a client by any person who enters into a professional-client relationship that permits professional physical access to the client's person or the opportunity to affect or influence the thought processes or emotions of such client, including, but not limited to, actions for professional malpractice or assault and battery, evidence of specific instances of the victim's prior or subsequent sexual conduct, opinion evidence of the victim's sexual conduct, and reputation evidence of the victim's sexual conduct shall be presumed to be irrelevant, except as provided in subsections (2) and (4) of this section. The persons to whom this subsection (1) applies in a civil action against such persons shall include any psychotherapist as defined in section 18-3-405.5, C.R.S., any medical professional, any member of the clergy, or any person acting under the color of a religious organization. This subsection (1) shall also apply in a civil action against a parent or other person in a position of trust, power, or authority over any child or other person, in a civil action by or on behalf of such child or such other person.

(2) Subsection (1) of this section notwithstanding, in any of the civil actions described in such subsection (1), evidence of the following shall be presumed to be relevant:

(a) Evidence of the victim's prior or subsequent sexual conduct with the defendant in such civil action;

(b) Evidence of specific instances of sexual activity showing the source or origin of semen, pregnancy, disease, or any similar evidence of sexual intercourse, including, but not limited to, genetic testing pursuant to section 13-25-126, offered for the purpose of showing that the act or acts alleged were or were not committed by the defendant in such civil action.

(3) In any civil action described in subsection (1) of this section, evidence of specific instances of the alleged victim's prior or subsequent sexual conduct is not subject to discovery.

(4) Notwithstanding subsections (1) and (3) of this section, evidence of specific instances of the alleged victim's prior or subsequent sexual conduct may be determined to be subject to discovery or offered as evidence, if the defendant or plaintiff requests a hearing prior to conducting discovery or attempting to admit such evidence and makes an offer of proof of the relevancy of such evidence and the court finds that the evidence is relevant and the probative value of such evidence outweighs its prejudicial effect. Such hearing shall be held no later than thirty days prior to trial. In making an order that such evidence is relevant, the court shall detail the information or conduct that is subject to discovery or which may be admitted into evidence.