Iowa Administrative Code Title 701 — Department of Revenue
Iowa Admin. Code r. 701—211.31(423) — Sign construction and installation
211.31(1) In general. Persons engaged in the business of constructing and installing signs are selling a service subject to sales tax. 211.31(2) Definition. For purposes of this rule: “Sign” means notices erected and maintained for the purpose of providing information, notices, markers, and the advertising of products or services. Signs include but are not limited to billboards, indoor or outdoor sign devices, and any structure erected and maintained for the purpose of conveying information.
Source: official text