Doc 9303第七版代表了国际民航组织机器可读旅行规范的重组 文件。在没有对规范进行实质性修改的情况下，新版Doc 9303已重新格式化为一号机读公务旅行证件（TD1）、二号机读公务旅行证件（TD2）和三号机读旅行证件（TD3）以及签证的一套规范。这套规范由各种单独的文件组成，其中包括通用规范（适用于所有MRTD）和MRTD形状系数特定规范。Doc 9303第3部分以Doc 9303第6版第1部分第1卷机器可读护照为基础- 具有以光学字符识别格式存储的机器可读数据的护照（2006年）和Doc 9303第三版第1卷第3部分，机器可读的官方旅行证件-具有以光学字符识别格式存储的机器可读数据的MRtds（2008年）。第3部分定义了TD1、TD2和TD3大小的机器可读旅行证件（MRTDs）通用的规范，包括使用视觉检查和机器可读（光学字符识别）手段实现全球互操作所需的规范。适用于每个形状系数的详细规范见文件9303第4部分至第7部分。

The Seventh Edition of Doc 9303 represents a restructuring of the ICAO specifications for Machine Readable Travel Documents. Without incorporating substantial modifications to the specifications, in this new edition Doc 9303 has been reformatted into a set of specifications for Size 1 Machine Readable Official Travel Documents (TD1), Size 2 Machine Readable Official Travel Documents (TD2), and Size 3 Machine Readable Travel Documents (TD3), as well as visas.This set of specifications consists of various separate documents in which general (applicable to all MRTDs) as well as MRTD form factor specific specifications are grouped.This Part 3 of Doc 9303 is based on the Sixth Edition of Doc 9303, Part 1, Volume 1, Machine Readable Passports - Passports with Machine Readable Data Stored in Optical Character Recognition Format (2006) and the Third Edition of Doc 9303, Part 3, Volume 1, Machine Readable Official Travel Documents - MRtds with Machine Readable Data Stored in Optical Character Recognition Format (2008).Part 3 defines specifications that are common to TD1, TD2 and TD3 size machine readable travel documents (MRTDs) including those necessary for global interoperability using visual inspection and machine readable (optical character recognition) means. Detailed specifications applicable to each form factor appear in Doc 9303, Parts 4 through 7.