The volumetric controls that currently apply to LAGs (Liquids, Aerosols and Gels) were developed and disseminated by ICAO following the unveiling in 2006 of a terrorist plot to sabotage aircraft in-flight by assembling an improvised explosive device using hazardous ingredients carried in seemingly ordinary LAGs.

As one of the registered and recognized STEB manufacturers of ICAO, TSG Security tamper-evident bags (STEBs) were developed to allow an exemption to volumetric controls for liquids purchased at airport retailers or on board aircraft and carried by transfer passengers.