A qualifying patient’s medical use of cannabis as authorized by a health care professional may not be a sole disqualifying factor in determining the patient’s suitability for an organ transplant, unless it is shown that this use poses a significant risk of rejection or organ failure. This section does not preclude a health care professional from requiring that a patient abstain from the medical use of cannabis, for a period of time determined by the health care professional, while waiting for a transplant organ or before the patient undergoes an organ transplant.