Each applicant for a license required by this chapter shall file, in writing, an application for the same on a form to be furnished by the Director of Finance and shall set forth the name and residence of such applicant and the articles he or she intends to sell thereunder. If the articles to be sold are such as are usually sold by weight or measure, the applicant shall file with this application a certificate of the County Sealer of Weights and Measures that his or her scales, weights and measures have within 30 days prior to the filing of such application, been examined, found correct and duly sealed by the County Sealer. The Director may require any applicant to make an oath or solemn affirmation to the facts stated in the application.