Duluth UDC § 608.05

a. Construction standards for signs requiring building permits. A temporary sign for which issuance of a building permit is required by the Building Code shall meet the same engineering design and materials standards as permanent signs as required by the Building Code. b. Construction standards for signs not requiring building permits. 1. Nonpermanent but water-resistant construction materials may be used, such as but not limited to poster board, foam core board or illustration board. 2. The words, letters, figures, symbols, logos, fixtures, colors or other design elements that convey the sign’s message shall be permanently applied to the sign’s face. c. Electronic and manual changeable copy signs shall not be allowed. d. Lighting. Temporary signs shall not be illuminated. 608.06. Temporary Banners, Portable Signs, Festoons and Inflatable Signs All of the following types of signs are allowed one time only for a change in use or change in occupancy of the premises from two weeks prior to the change in use or occupancy until two weeks after the change in use or occupancy with the issuance of a temporary sign permit, and in accordance with the duration, number, size, location and lighting limitations of Section 608. For holiday or seasonal decorations (in contrast to commercial signs), see Section 602.02.