Except that first act passed in 1790 only lasted for 5 years and expired in 1795. It merely codified into law the language of Article II that gave any children born of citizens "at the time of the adoption of this Constitution" the right to serve as President. That time expired in 1795.
Sorry sir, you are incorrect. It was replaced with another act of Congress. The Naturalization Act of 1790 was replaced by the Naturalization Act of 1795 which was replaced by the Naturalization Act of 1798. So on and so forth.
That is how Congress expresses its will and exercises it enumerated power (Article I Section 8) to define the rules of naturalization - by passing acts that either replace or amend existing law.