The "CABLE Expansion Act" amends the Communications Act of 1934 to regulate the authority of local franchising entities concerning cable infrastructure. It clarifies that while a franchising authority retains power over decisions regarding the placement, construction, and modification of cable facilities, this authority is subject to specific limitations. These limitations are designed to prevent regulations from prohibiting or effectively prohibiting a cable operator's ability to provide or enhance cable service under a granted franchise. A key provision establishes strict timelines for franchising authorities to act on complete requests for authorization. For facilities on existing eligible support infrastructure , a decision must be made within 90 days, while other facilities have a 150-day deadline. These timeframes apply collectively to all necessary proceedings and cannot be tolled by any moratorium. Furthermore, any decision by a franchising authority to deny a complete request must be in writing, supported by substantial evidence, and publicly released. The bill also defines when a request is considered complete, stating it is complete if the requesting party does not receive a written notice of missing information within 10 business days. This aims to streamline the application process and ensure clarity for cable operators. Ultimately, the legislation seeks to balance local control over public rights-of-way with the need for efficient deployment and enhancement of cable services by operators.