Millard L-891 and L-892 frangible Low Impact Resistant (LIR) masts are certified to meet all criteria outlined under FAA Advisory (AC) 150/5345-53. the frangibility criteria are similar to that of the ICAO certification but specific to fibreglass towers and the US market. Millard Towers is listed under the FAA AC 150/5345-45C as an FAA approved supplier of LIR structures.