where in the CR does it reference you needing to have control of a battlefield or the battlefield triggers that reference "you" dont work?

According to Rule 187.6.c in the Core Rules (2026-03-30), the reference for this mechanic is:

"187.6.c. “You” in a battlefield’s abilities refers to the battlefield’s Controller, as does the implied “you” in instructions like “draw 1.” If the battlefield has no Controller, “you” refers to no one, and all such instructions are ignored."