4.—(1) If, before the expiration of the period referred to in paragraph 1(b), the Department receives an objection from any person on whom a copy of the notice is required to be served under paragraph 2(1) or from any other person appearing to it to be affected, it shall, subject to sub-paragraph (2), cause a local inquiry to be held unless the objection is withdrawn.N.I.
(2) Unless the objection is made by a person on whom a notice was served under paragraph 2(1), the Department may dispense with an inquiry if it is satisfied that it is unnecessary to hold one.