(1)  A witness who cannot hear adequately may be questioned in any appropriate way.

(2)  A witness who cannot speak adequately may give evidence by any appropriate means.

(3)  The court may give directions concerning either or both of the following:

(a) the way in which a witness may be questioned under subsection (1) ;

(b) the means by which a witness may give evidence under subsection (2) .

(4)  This section does not affect the right of a witness to whom this section applies to give evidence about a fact through an interpreter under section 30 .