(1) A person who gives a consent under section 10(1) or 16 may withdraw it at any time before the procedure or action consented to is carried out.
(2) A withdrawal of consent under this section must be in writing.
(3) A person withdrawing a consent must give the withdrawal or cause the withdrawal to be given as soon as practicable—
(a) to the registered ART provider or doctor to whom the consent was given; or
(b) to the registered ART provider or doctor with whom the sperm, oocyte or embryo to which the consent relates is kept or stored; or
(c) in accordance with the regulations.