HgTX:
From the Texas PE board laws:
§137.51 General Practice
(a) In order to safeguard, life, health and property, to promote the public welfare, and to establish and maintain a high standard of integrity and practice, the rules relating to professional conduct in this title shall be binding on every person holding a license and on all firms authorized to offer or perform engineering services in this Texas.
(b)[red] License holders having knowledge of any alleged violation of the Act and/or Board rules shall cooperate with the Board in furnishing such information or assistance as may be required.[/red]
and....
§137.55 Engineers Shall Protect the Public
(a) Engineers shall be entrusted to protect the health, safety, property, and welfare of the public in the practice of their profession. The public as used in this section and other rules is defined as any individual(s), client(s), business or public entities, or any member of the Texas Engineering Practice Act and Rules Page 46 of 57 Effective 3/20/06
general population whose normal course of life might reasonably include an interaction of any sort with the engineering work of the license holder.
(b) Engineers shall not perform any engineering function which, when measured by generally accepted engineering standards or procedures, is reasonably likely to result in the endangerment of lives, health, safety, property, or welfare of the public. Any act or conduct which constitutes incompetence or gross negligence, or a criminal violation of law, constitutes misconduct and shall be censurable by the Board.
(c) Engineers shall first notify involved parties of any engineering decisions or practices that might endanger the health, safety, property or welfare of the public.[red] When, in an engineer’s judgment, any risk to the public remains unresolved, that engineer shall report any fraud, gross negligence, incompetence, misconduct, unethical or illegal conduct to the Board or to proper civil or criminal authorities.[/red]
So this seems to suggest that since an engineer's primary responsibility is for the public health, safety, and welfare, and you are aware of some violation or engineering practice that would jeapardize the public, you are obligated, ethically and legally, to notify the board.