Harry Blackmun,
Lujan v. Defenders of Wildlife…
“ The Court never has questioned Congress' authority to impose such procedural constraints on executive power. Just as Congress does not violate separation of powers by structuring the procedural manner in which the Executive shall carry out the laws, surely the federal courts do not violate separation of powers when, at the very instruction and command of Congress, they enforce these procedures.To prevent Congress from conferring standing for "procedural injuries" is another way of saying that Congress may not delegate to the courts authority deemed "executive" in nature. ”
