The commission shall have the power by its duly authorized agent or representative to enter upon the premises of any grower or dealer to examine any books, papers, records or memorandum [memoranda] bearing on the amount of assessments or license fees payable and to secure other information directly or indirectly concerned in the enforcement of this act. No person who is required to pay the assessments of license fees levied and imposed by this act shall by any practice or evasion make it difficult to enforce the provisions of this act by inspection, nor shall such person after demand by the commission or any agent or representative designated by it for that purpose, refuse to allow full inspection of the premises or any part thereof or any books, records, documents or other instruments in any way relative to the liability of such person for the assessment or license fee herein imposed nor shall such person hinder or in any manner delay or prevent such inspection.