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2 <br />This Guidance is applicable to conforming signs, as applying updated technology to <br />nonconforming signs would be considered a substantial change and inconsistent with the <br />requirements of 23 CFR 750.707(d)(5). As noted below, all of the requirements in the HBA <br />and its implementing regulations, and the specific provisions of the FSAs, continue to apply. <br />Backzround <br />The HBA requires States to maintain effective control of outdoor advertising adjacent to <br />certain controlled routes. The reasonable, orderly and effective display of outdoor <br />advertising is permitted in zoned or unzoned commercial or industrial areas. Signs displays <br />and devices whose size, lighting and spacing are consistent with customary use determined <br />by agreement between the several States and the Secretary, may be erected and maintained in <br />these areas (23 U.S.C. § 131(d)). Most of these agreements between the States and the <br />Secretary that determined the size, lighting and spacing of conforming signs were signed in <br />the late 1960's and the early 1970's. <br />On July 17, 1996, this Office issued a Memorandum to Regional Administrators to provide <br />guidance on off -premise changeable message signs and confirmed that FHWA has "always <br />applied the Federal law 23 U.S.C. 131 as it is interpreted and implemented under the Federal <br />regulations and individual Federal/State agreements.". It was expressly noted that "in the <br />twenty -odd years since the agreements have been signed, there have been many <br />technological changes in signs, including changes that were unforeseen at the time the <br />agreements were executed. While most of the agreements have not changed, the changes in <br />technology require the State and FHWA to interpret the agreements with those changes in <br />mind". The 1996 Memorandum primarily addressed tri-vision signs, which were the leading <br />technology at the time, but it specifically noted that changeable message signs "regardless of <br />the type of technology used" are permitted if the interpretation of the FSA allowed them. <br />Further advances in technology and affordability of LED and other complex electronic <br />message signs, unanticipated at the time the FSAs were entered into, require the FHWA to <br />confinn and expand on the principles set forth in the 1996 Memorandum. <br />The policy espoused in the 1996 Memorandum was premised upon the concept that <br />changeable messages that were fixed for a reasonable time period do not constitute a moving <br />sign. If the State set a reasonable time period, the agreed -upon prohibition against moving <br />signs is not violated. Electronic signs that have stationary messages for a reasonably fixed <br />time merit the same considerations. <br />Discussion <br />Changeable message signs, including Digital/LED Display CEVMS, are acceptable for <br />conforming off -premise signs, if found to be consistent with the FSA and with acceptable <br />and approved State regulations, policies and procedures. <br />