SCHEDULEProhibited degrees of relationship
Child
Grandchild
Parent
Grandparent
Spouse
Civil partner
Child, grandchild, parent, grandparent, sister, brother of a civil partner
Sister
Brother
Daughter-in-law
Son-in-law
Brother-in-law
Cohabitee
Child, grandchild, parent, grandparent, sister, brother of a cohabitee
For the purposes of this schedule—
a
a relationship of the half-blood is to be treated as a relationship of the whole-blood; and
b
the stepchild of a person is to be treated as the child of that person.