77. Capacity to make a will.
(1) To be valid a will shall be made by a person who -
(a) has attained the age of eighteen years or is or has been married, and
(b) is of sound disposing mind.
(2) A person who is entitled to appoint a guardian of an infant may make the appointment by will notwithstanding that he is not a person to whom paragraph (a) of subsection (1) applies.