a. In prosecutions for predatory criminal sexual assault of a child, aggravated criminal sexual assault, criminal sexual assault, aggravated criminal sexual abuse, criminal sexual abuse, or criminal transmission of HIV; and in prosecutions for battery and aggravated battery, when the commission of the offense involves sexual penetration or sexual conduct as defined in Section 11-0.1 of the Criminal Code of 2012; and with the trial or retrial of the offenses formerly known as rape, deviate sexual assault, indecent liberties with a child, and aggravated indecent liberties with a child, the prior sexual activity or the reputation of the alleged victim or corroborating witness under Section 115-7.3 of this Code is inadmissible except (1) as evidence concerning the past sexual conduct of the alleged victim or corroborating witness under Section 115-7.3 of this Code with the accused when this evidence is offered by the accused upon the issue of whether the alleged victim or corroborating witness under Section 115-7.3 of this Code consented to the sexual conduct with respect to which the offense is alleged; or (2) when constitutionally required to be admitted.
     b. No evidence admissible under this Section shall be introduced unless ruled admissible by the trial judge after an offer of proof has been made at a hearing to be held in camera in order to determine whether the defense has evidence to impeach the witness in the event that prior sexual activity with the defendant is denied. Such offer of proof shall include reasonably specific information as to the date, time and place of the past sexual conduct between the alleged victim or corroborating witness under Section 115-7.3 of this Code and the defendant. Unless the court finds that reasonably specific information as to date, time or place, or some combination thereof, has been offered as to prior sexual activity with the defendant, counsel for the defendant shall be ordered to refrain from inquiring into prior sexual activity between the alleged victim or corroborating witness under Section 115-7.3 of this Code and the defendant. The court shall not admit evidence under this Section unless it determines at the hearing that the evidence is relevant and the probative value of the evidence outweighs the danger of unfair prejudice. The evidence shall be admissible at trial to the extent an order made by the court specifies the evidence that may be admitted and areas with respect to which the alleged victim or corroborating witness under Section 115-7.3 of this Code may be examined or cross examined.