A licensee served with a requisition under section 100 of the Act must furnish the required statement in writing--
(a) by delivering the statement to the Secretary, or a person employed in the Department nominated by the Secretary for the purpose of receiving such statements, at the address of the Department appearing in the requisition, or
(b) by sending the statement to the Secretary at the address of the Department appearing in the requisition so as to be received, by the Secretary or an employee of staff so nominated, within 7 days after service of the requisition.