12. (1) Subject to this section, a person may, by notice in writing to the operator of the DAHR facility to which his or her declaration under section 11(1)(d) 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 DAHR procedure to which the consent relates that has been performed before the notice under that subsection is received by the operator of the DAHR facility at which the procedure was performed.