6(1)If an objection is received by the Secretary of State within the period specified for making objections, and is not withdrawn, then—
(a)if the objection is from a local authority on whom a copy of the notice is required to be served under paragraph 2, the Secretary of State shall cause a local inquiry to be held;
(b)if the objection is from any other person appearing to the Secretary of State to be affected, he shall cause a local inquiry to be held unless he is satisfied that in the circumstances of the case it is unnecessary.
(2)The period specified for making objections means the period specified in the notice under paragraph 1(1) or (2) or any longer period substituted by a further notice under paragraph 1(3).