Here's Section 3 of an Amendment I created to Article 1 Section 7, related to Congressional Procedures. I suspect your amendment would fit well within the Full amendment.
Section 3 All Bills shall address only one Issue: They shall be written in plain, common-sense English prose that all people can Understand: They shall clearly site the Constitutional Authority authorizing them: and shall have no unrelated Riders attached to them:
All Amendments to Bills must fit within the scope and object of the original bill:
Let me know what you think of this one. I'll post the other parts of the Amendment if you're interested, in short excerpts.