AS 7503 Railway Rolling Stock - Train Identification and Integrity Part 4 - Infrastructure Maintenance Rolling Stock covers the following aspects of railway infrastructure maintenance rolling stock:- That each vehicle shall have a specific vehicle identifier- Requirements for display of the identifier- The fitment of a manufacturer’s nameplate on each new vehicle- Requirements for AEI tags- Requirements for identification of equipment.The standard does not cover:- Operation of rolling stock in regards to network safeworking rules and route standards which, however, may apply in addition to this standard- Vehicles used on light rail, cane railway and monorail networks- Heritage vehicles operating on a railway solely under the control of the Rolling Stock Operator of that heritage rolling stock, or on a railway under the control of another Rolling Stock Operator solely operating heritage rolling stock.