Home Affairs changed the regulations in 2020. If an airport handles over 30,000 RPT pax per annum that it needs screening for aircraft operations of 40 seats or more. Seems very convenient that the Saabs continue to fit nicely under that threshold.
I thought the rules were that RPT flights with aircraft with a MTOW of 20,000kg (20 tonnes) or more - the airports where those aircraft flew to, they had to have security screening in place.
Unless things and rules have changed since then?