AC 91-18 - Restraints of infants and children Updated: 24 November 2021 The purpose of Advisory Circular AC 91-18 is to provide information on the use of child restraint systems by infants,… Advisory Circular Flight ops - General resource Flight operations Version: 1.1 DOWNLOAD Download AC 91-18 - Restraint of infants and children (PDF, 736.71 KB)