i remember 1970 to 1984 25% NO allow cockpit viist
then 1994 to 2001 60% NO allow cockpit visit by from Aeroflot A310 crashed. some other airlines emirates, thai, ANA, JAL, etc captain told me that NO cockpit visit by from Aeroflot A310 but sometimes Captain good kind nice permit allow cockpit visit with proof of airline staff ID card and captain discreation.
then after 11th september 2001 99% NO cockpit visit after WTC new york.
All major airlines SHOULD NOT follow Aerioflot rules and WTC.
it bad luck