Where an offender convicted of having sexual intercourse with a child under s 70(1) of the Criminal Law (Codification and Reform) Act is HIV positive, the mandatory minimum sentence of 10 years imprisonment prescribed in s 80(1)(c) applies unless the offender establishes 'special circumstances peculiar to the case' as provided in the proviso at s 80(1)(c)(ii). 'Special circumstances peculiar to the case' means circumstances that are out of the ordinary, either in their nature or extent. Ordinary mitigating factors such as the offender's age, lack of sophistication, guilty plea, first offender status, consensual nature of the relationship, small age disparity, the parties living together, potential hardship to family, and time served do not, individually or cumulatively, constitute special circumstances peculiar to the case. Such factors are considerations in determining the length of sentence within the applicable sentencing range but do not justify departure from mandatory minimum sentences.