I dunno, "delineating" it differently from what it has always been sounds like a "change" to me.
In 1875 in Minor v Happersett, the Supreme Court said that “the Constitution does not say, in words, who shall be natural born citizens. Resort must be had elsewhere to determine that.”
I was suggesting that a possible “elsewhere” might be a bill passed by Congress and signed into law by a president.
Which again sounds to my ear as if you think the meaning is fungible. I regard it as an absolute, like the meaning of "pi"; a fundamental constant, not subject to redefinition.
The meaning has been “jus soli,” a person born in the U.S. or a person born overseas to American parents who have lived in the U.S. with exceptions to the rule for persons born to foreigners with diplomatic immunity and members of a foreign invading military plus prior to 1924, persons born with American Indian tribal sovereignty.
We have specific law to that effect: 8 U.S.C. § 1401
“To further delineate” natural born citizen as requiring two U.S. citizen parents even if a person is born in the U.S. would require legislation, constitutional amendment or a Supreme Court ruling to that effect.