amendment addition of the technical regulations for the railroad constituents. background on the technical regulations for railroad constituents regarding railroad constituents notified by the ministry of land infrastructure and transport molit manufacturer or his representative shall get type approval from molit for the newly-designed railroad constituents or remarkably modified constituents. also manufacturer shall obtain manufacturer approval from molit to enter into mass production for the type approved constituents railroad safety act article 27 and 27-2 . type approval is granted to the design for notified constituents that meets technical and safety requirements in the technical regulations. manufacturer approval is production approval for the type approved constituents that manufacturer can meet quality management requirements in the technical regulations. molit plans to amend to add the technical regulations for type approval examination of 6 notified constituents so as to enhance the safety of railroad system including rolling stock and energy system. molit has enacted the technical regulations for the examination of type approval and manufacturer approval of 10 notified constituents in 2016 which were wheel axle coupler rail glued insulated rail pre-stressed concrete sleeper electronic interlocking system af audio frequency track circuit automatic block system and contact wire. amendment addition of the technical regulations for railroad constituents the technical regulations added for 6 notified constituents in 2017 regulate scope terms and definitions conformity assessment design requirements and testing procedures. design requirements include general requirements materials strength interface with other constituents maintainability and etc. pneumatic wsp wheel slide protection scope terms and definitions conformity assessment design requirements general requirements materials strength functional characteristics mechanical electrical characteristics environmental characteristics interface with other constituents maintainability and testing procedures. pneumatic brake cylinder scope terms and definitions conformity assessment design requirements general requirements materials strength inner surface characteristics functional characteristics mechanical electrical characteristics environmental characteristics interface with other constituents maintainability and testing procedures. brake disk scope terms and definitions conformity assessment design requirements general requirements materials strength inner surface characteristics mechanical electrical characteristics environmental characteristics interface with other constituents maintainability and testing procedures. brake pad scope terms and definitions conformity assessment design requirements general requirements materials strength inner surface characteristics mechanical electrical characteristics interface with other constituents maintainability and testing procedures. tensioning device for overhead catenary system scope terms and definitions conformity assessment design requirements general requirements mechanical performance field testing interface with other constituents maintainability . polymer type insulator scope terms and definitions conformity assessment design requirements general requirements mechanical electrical characteristics field testing interface with other constituents maintainability and testing procedures.