The phrase "amendment on which" is correct and usable in written English.
It can be used when referring to a specific amendment in a legal or formal context, often to indicate the basis or foundation of a discussion or argument.
Example: "The court's decision was based on the amendment on which the case was filed."
Alternatives: "amendment that" or "amendment regarding".
Strom Thurmond of South Carolina quizzed the nominee on trivia regarding the 14th Amendment, on which Marshall was considered an expert, and when Marshall didn't know some information, Thurmond deemed him unfit.
They quizzed him on arcana about the 14th Amendment, on which he was supposedly expert, and when he missed certain questions, they smugly deemed him unqualified.
It is those amendments, he writes, "on which so much of our freedom depends".
Perhaps I could group the questions around six groups of amendments on which I can comment one by one.
Ms. Collins and Mr. Lieberman tried Wednesday to winnow the amendments on which votes would be allowed.
The slew of Brexit amendments on which MPs are to vote display both an unprecedented abuse of parliamentary procedure and a continuing refusal to face reality.
Or what if Democrats offer amendments to raise the minimum wage or address pay equity for women, amendments on which blue state Republicans could feel both electoral pressures to support and party pressures to oppose?
One of the amendments on which the government was defeated came from the independent crossbencher Baroness Meacher.
The amendments, on which the board is scheduled to vote Aug. 1, are intended to clarify the wording of the ordinance.
Chief Justice Roberts's opinion did not address Citizens United or the First Amendment argument on which it was based.
The Senate vote is expected on Wednesday, although several senators today offered an amendment, action on which was delayed, that would extend a dairy compact authorizing a system of milk price controls in New England.
