1) Bill changer 2) Bill modifier 3) Bill of Rights writer 4) Change maker 5) Constitution modifier 6) Copyreader 7) Editor, at times 8) One changing a bill 9) One who tacks riders on bills 10) Person who makes change 11) Revisionist 1) Revisor 
• (n.) One who amends.
A·mend'er noun One who amends.