Although the executor may subdelegate the preparatory acts, he may not, unless the rescript expressly says so, subdelegate the actual execution of the decree, unless he subdelegates to another ordinary.
A rescript "in forma commissoria" is valid, if the reason alleged for the grant be true at the time of execution, though false when the rescript was issued.
If it is only the impelling cause, and the substance of the petition is not affected, or if the false statement was made through ignorance, the rescript is not vitiated.
Intentional falsehood or concealment of truth (obreption and subreption) renders a rescript invalid, since no one should benefit through his own deceit.