Which amendment law was approved most recently?

The correct choice indicates that PD 1534 is the most recent amendment law approved. This law, formally known as the "Optometry Law of 1977," brought significant changes to the practice of optometry, reflecting the evolving needs and standards of the profession. Laws like this are typically amended to update practices, adapt to new technological advancements, and address any gaps or legal ambiguities that emerge over time.

PD 1534 was enacted to refine and modernize regulations surrounding the optometric field, outlining practitioners' rights, responsibilities, and the frameworks for professional conduct. Understanding the context and progression of laws in the healthcare sector is crucial, as they not only ensure compliance but also help maintain high standards of patient care and safety.

In contrast, the other laws mentioned may be older or have been previously amended, thus not reflecting the latest changes in the regulatory landscape of healthcare professions, particularly optometry. Each of these laws holds historical significance and contributes to the body of legislation governing various medical fields, but PD 1534 stands out as the most recently approved amendment law.