15.—(1) A member who has purchased a residential property jointly with one or more persons shall not be entitled to make an application for the withdrawal of money under these Regulations unless the relationship between the co-purchasers or co-owners of the property falls within any of the following categories:
(a)
husband and wife;
(b)
parent and child;
(c)
brother and brother, sister and sister or brother and sister;
(d)
grandparent, parent and child;
(e)
grandparent and grandchild.
(2) Notwithstanding paragraph (1), the Board may, in its discretion, permit any withdrawal of money under these Regulations by a member who has purchased a residential property jointly with one or more persons, although the relationship between the co-purchasers or co-owners is not within any of the categories specified in paragraph (1).
(3) Where 2 or more co-purchasers or co-owners of a residential property each make an application for the withdrawal of money under regulation 6 or 7 or both, the total amount of money which may be withdrawn by them under either or both of those regulations shall not exceed the limit prescribed by regulation 9 or 11, as the case may be.