Upon a conviction of a violation of Section 11352, 11360, 11379, or 11379.5 of the Health and Safety Code, the fact that the person who committed the offense knew, or reasonably should have known, that any of the following circumstances existed with regard to the person to whom he or she unlawfully sold, furnished, administered, or gave away a controlled substance, shall be a circumstance in aggravation of the crime in imposing a term pursuant to subdivision (b) of Section 1170: