You can get aviation security services from different providers. Aviation security services can be provided by AvSec at certain aerodromes or navigation installations. They can also be provided by the people who run these aerodromes or installations, or by airlines at the aerodromes where they operate. This is similar to what was stated in the 1990 No 98 s 79(1). You might see these services at security designated aerodromes or security designated navigation installations. The people who provide these services are called aviation security service providers.