These screen captures were taken from official DOTr documentation for the bid invitation for the Project Management Consultancy project for the Mindanao Railway. They show the design codes and standards that the chosen contractor must satisfy.
Section 1.3 of this document provides an excellent primer for various standards listed in the document. It provides insight into how Philippine and Chinese standards are used together, when one takes precedence over the other, and how the DOTr ultimately expects the railway to conform to international standards.
An exhaustive list of codes, that are applicational to the Mindanao Railway, is available below. Additional discussions about this list available in the following post on a companion forum and on this page's Facebook extension.