Was It Legal And Or Ethical For An Engineer To Sign And Seal Plans That Were Not Prepared By Him Or Prepared Under His Responsible Direction Supervision Or Control?

Was It Legal And Or Ethical For An Engineer To Sign And Seal Plans That Were Not Prepared By Him Or Prepared Under His Responsible Direction Supervision Or Control? It is unethical for Engineer A to seal plans that have not been prepared by him, or which he has not checked and reviewed in detail.