Title 8 is a collection of laws and policies, some legislative statutes, some constitutional clauses, some writings by policy wonks in government departments. Fortunately for us, you cant just throw something into Title 8 and call it constitutional law or a definition of constitutional law.
Congress has never created a natural born citizen. All citizens they have created are naturalized citizens, per their enumerated powers.
Even if Title 8 was codified into positive law, and it’s not, it wouldn’t trump the Constitution.
Which “title” was in play regarding the clean air act? Has that code been enacted into positive law? What constitutional questions were in play?
8 USC 1401 is part of the US code, laws passed by Congress. Title 8 CFR contains the implementing regulations. For 8 USC 1401 the regulations depending upon it are 8 CFR 301.