To facilitate ready and authoritative identification of goods or articles made by blind persons, any person and any public or private institution or agency, firm, association or corporation engaged in the manufacture or distribution of goods or articles made by a blind person or persons shall apply to the Department for a registration and authorization to use an official imprint, stamp, symbol or label, designed or approved by the Department, to identify goods and articles as made by blind persons. Nothing in this article shall authorize the identification of goods or articles as made by blind persons when the labor performed by blind persons in connection therewith shall consist solely of the packaging or packing thereof as distinguished from the preparation, processing or assembling of such goods or articles; nor shall any package the contents of which are not blind-made carry the label “packaged by the blind” or words of similar import. The Department shall investigate each application, under regulations it shall adopt for the administration of this article, to assure that such person or organization is actually engaged in the manufacture or distribution of blind-made goods or articles. The Department may register, without investigation, nonresident individuals and out-of-state agencies, firms, associations or corporations upon proof that they are recognized and approved by the state of their residence or organization pursuant to a law of such state imposing requirements substantially similar to those prescribed pursuant to this article. All registrations shall be valid for one year from date of issue. Nothing in this article shall be deemed to prohibit the offering for sale or sale by a blind person of an article or articles made by such blind person without application for registration or to require the labeling of such article or articles.