(1) diligent, careful, good faith, and impartial execution of law or office;
(2) a duty not to misuse an office’s funds and or take unauthorized profits;
(3) a duty not to act ultra vires, beyond the scope of the office.
A. pardon powers
B. removal powers
C. powers of suspension/non-enforcement of statutes for policy and perhaps even constitutional reasons
D. agencies’ interpretation of statutes to pursue Congress’s objectives.
E. Self-dealing...
etc.