Upon receipt of an application made in terms of subsection (1) of section sixty-six, the Minister may—
(a) appoint a board of investigation to inquire into and report to him on— (i) whether or not the opinion of the authority set out in that subsection is well founded; and
(ii) if the opinion referred to in subparagraph (i) is well founded, whether or not the alternative accommodation referred to in paragraph (c) of subsection (2) of that section is adequate; and
(iii) whether or not it would be desirable—
A. to grant a clearance warrant in respect of the whole or any part of the area outlined and described in terms of paragraph (a) of subsection (2) of that section; or
B. to refuse to grant a clearance warrant;
and
(iv) any other matters relevant to such application; or
(b) refuse such application.