Which of the following is not an objective of PD 1570?

The correct answer reflects that the promotion of international engineering practices is not explicitly one of the objectives of PD 1570. PD 1570, or Presidential Decree No. 1570, primarily focuses on specific local regulations pertaining to the practice and standards of aeronautical engineering within the Philippines.

The first three options—examination for registration, regulation of the accredited professional organization, and standardization and regulation of aeronautical engineering—are all fundamental aspects of the decree's intent to govern the profession. These objectives ensure that practitioners in the field meet certain standards of competence and ethical practices, which are essential for maintaining the integrity and safety of aeronautical engineering.

In contrast, promoting international engineering practices, while important in a broader context, is not a direct focus of PD 1570, indicating that its primary concern lies within national regulation and standards rather than aligning with international benchmarks.