I, III, and IV are part of the ISTQB code of ethics, which can be found in 2:
The Code consists of nine principles related to the behavior of and decisions made by professional software testers, including practitioners, trainers, supervisors, managers, authors, standards makers and employers.
The Code provides an ethical foundation to which individuals within teams and the team as a whole can appeal. The Code helps to define those actions that are ethically improper to request of a software tester or for a software tester to perform.
A distinguishing mark of a profession is acceptance of its responsibility to the public. The Code prescribes these as obligations of anyone claiming to be or aspiring to be a software tester.
Certified software testers shall commit themselves to making the analysis, specification, design, development, testing and maintenance of software a beneficial and respected profession. In accordance with their commitment to the health, safety and welfare of the public, software testers shall adhere to the following Eight Principles:
PUBLIC - Certified software testers shall act consistently with the public interest.
CLIENT AND EMPLOYER - Certified software testers shall act in a manner that is in the best interests of their client and employer consistent with the public interest.
PRODUCT - Certified software testers shall ensure that the deliverables they provide (on the products and systems they test) meet the highest professional standards possible.
JUDGMENT - Certified software testers shall maintain integrity and independence in their professional judgment.
MANAGEMENT - Certified software testing managers and leaders shall subscribe to and promote an ethical approach to the management of software testing.
PROFESSION - Certified software testers shall advance the integrity and reputation of the profession consistent with the public interest.
COLLEAGUES - Certified software testers shall be fair to and supportive of their colleagues.
SELF - Certified software testers shall participate in lifelong learning regarding the practice of their profession and shall promote an ethical approach to the practice of the profession.
II is not part of the code of ethics, as it is not always required or appropriate for certified software testers to sign a NDA (Non Disclosure Agreement) in presence of customer data.