Who is responsible for investigating all violations of the provisions of PD 1570?

The responsibility for investigating violations of the provisions of Presidential Decree No. 1570 rests with the Board. This decree pertains to the establishment and supervision of a system of technical-vocational education in the Philippines. The Board is tasked with overseeing adherence to the guidelines set forth in this legislation, making it incumbent upon them to ensure compliance and investigate any infractions.

Understanding the role of the Board is crucial because they are equipped with the authority and resources needed to enforce the regulations outlined in the decree. The Board can conduct investigations, implement necessary actions, and recommend penalties, thus playing a key role in maintaining the integrity of the technical-vocational education system.

The other options, such as a Commission or the President of the Philippines, do not specifically hold the investigative authority laid out in PD 1570. While there are various governmental bodies that oversee different regulations, the specific task of investigating violations under this decree is explicitly assigned to the Board, confirming their pivotal role in the governance of technical-vocational education within the framework of this legislation.