17.—(1) An employer in a registered concern shall retain—
(a)written information obtained by him (whether in pursuance of these Regulations or otherwise) about an employee in the concern which might be used if any of the methods prescribed by these Regulations for making a determnation were applied to that person; and
(b)a record of the determination made by him in respect of any such person,
until the expiration of three years from the date on which the person to whom the information or determination relates ceases to be employed in the concern.
(2) Any person who, without reasonable excuse, fails to comply with the requirements of this regulation shall be guilty of an offence and shall be liable on summary conviction to a fine not exceeding level 5 on the standard scale.