Domestic Abuse (Scotland) Bill 3 Part 1—Offence as to domestic abuse (3) Evidence from a single source is sufficient to prove that the offence is so aggravated. (4) Where subsection (1) applies, the court must— (a) state on conviction that the offence is so aggravated, (b) record the conviction in a way that shows that the offence is so aggravated, 5 (c) take the aggravation into account in determining the appropriate sentence, and (d) state— (i) where the sentence imposed in respect of the offence is different from that which the court would have imposed if the offence were not so aggravated, the extent of and the reasons for that difference, or 10 (ii) otherwise, the reasons for there being no such difference. (5) In this section, the references to a child are to a person who— (a) is not A or B, and (b) is under 18 years of age. 5 Defence on grounds of reasonableness 15 (1) In proceedings for an offence under section 1(1), it is a defence for A to show that the course of behaviour was reasonable in the particular circumstances. (2) That is to be regarded as shown if— (a) evidence adduced is enough to raise an issue as to whether the course of behaviour is as described in subsection (1), and 20 (b) the prosecution does not prove beyond reasonable doubt that the course of behaviour is not as described in subsection (1).