8. (1) Subject to this section, a donor of a gamete may, by notice in writing to the operator of the donation facility to which his or her declaration under section 6(1)(c) was made, revoke his or her consent under that section.

(2) A revocation of consent under subsection (1) shall have no effect in respect of a gamete to which the consent relates that has been used at a DAHR facility in the formation of an embryo before the date on which the notice under that subsection is received by the operator of the DAHR facility concerned.