"Close relatives” are defined as:

• Parents (including step-parents & in-laws)
• Children
• Grandparents (including in-laws)
• Siblings (including half-siblings)
• Uncles and aunts - siblings of parents or spouse's parents only
• Nieces and nephews

On loans over 80% LTV, income boosters must be close relatives of at least one of the owners. For family concessionary purchases, the vendor must be a close relative of at least one of the owners.