28.— (1) A consent to the making of an adoption order is not valid unless given—

(a) after the child concerned has attained the age of 6 weeks, and

(b) not earlier than 3 months before the application for adoption.

(2) The Authority shall satisfy itself that every person whose consent to the making of an adoption order is necessary and has not been dispensed with—

(a) has given the consent, and

(b) understands the nature and effect of the consent and of the adoption order.