The chief of staff can relay orders from the president to cabinet members and department heads, but cannot make decisions of this scope.
I don't really know how any of that is relevant, though. Musk is not Trump's chief of staff, and as far as we can tell, is not even employed by the federal government. He is not empowered to give (for example) orders to the head (confirmed or acting) of the OMB.
The chief of staff can relay orders from the president to cabinet members and department heads, but cannot make decisions of this scope.
I don't really know how any of that is relevant, though. Musk is not Trump's chief of staff, and as far as we can tell, is not even employed by the federal government. He is not empowered to give (for example) orders to the head (confirmed or acting) of the OMB.