1883 - Safety Appliance act passed.
1900 - Cars required to be equipped with air brakes and knuckle couplers.
1911 - Safety Appliance Act amended to include ladders and grabirons.
1928 - Wood draft sills banned from interchange.
1933 - Type E or F couplers required on all new cars.
1933 - Rotary uncoupling levers required on new or rebuilt cars.
1934 - AAR created from ARA.
1937 - AB brakes required on all new cars.
1937 - Geared handbrakes are required on new or rebuilt cars.
1938 - Billboard cars banned.
1940 - Arch bar trucks banned in interchange service.
1945 - Wood running boards outlawed on new cars.
1948 - Plate B adopted, maximum height of 15 ft 1 in.
1954 - K brakes are banned in interchange service.
1957 - Trucks with cast journal boxes required (Andrews type trucks banned).
1958 - Cast iron wheels banned on new cars.
1959 - Allied Full Cushion trucks banned.
1963 - Plate C adopted, maximum height of 15 ft 6 in.
1966 - Roof running boards are banned.
1967 - High mounted brake wheels on new cars are banned.
1968 - ACI labels are installed.
1970 - Cast iron banned in interchange.
1970 - No underframes over 50 years old premitted.
1972 - ACI labels no longer required.
1972 - Roller bearings required on all 6 1/2 x 11 journals.