You are a supervisor for a complex design project, and are aware of the NCEES code rule according to which engineers may coordinate an entire project provided that each design component is signed or sealed by the engineer responsible for that design component.
Your are very overworked, and so have got into the habit of, in effect, rubber-stamping the design decisions of the subordinate engineers working on your project. You do not testing or checking of your own on their projects, and routinely approve their plans (after they have signed or sealed them) with only the most superficial read-through of their work. In your mind this policy is justifiable because the NCEES rule says nothing about the supervisory responsibilities of someone in your position. Besides which, you trust the engineers to do a good job, and so see no need to check up on them.
Is the supervisor's position here ethically justifiable?