Article 309

A person who, knowing that another person is by blood relationship his or her parent, child, brother, sister, half-brother, half-sister, grandparent or grandchild, as the case may be, has sexual intercourse with that other person,

is guilty of incest, a Class 9 serious offence, punishable with a definite term of imprisonment of not less than 1 year and not more than 3 years.