47.—(1) An adoption order may be made on the application of a couple where both of them have attained the age of 21.
(2) An adoption order may be made on the application of a couple where—
(a)one of the couple is the mother or the father of the person to be adopted and has attained the age of 18 years; and
(b)the other has attained the age of 21 years.