Okay, I'll actually answer the OP. If you read other agency standards they sometimes read as being higher than GUE's standards.
For example, TDI's Intro to Tech standards read, "Demonstrate adequate buoyancy control (ability to hover at fixed position in water column without moving hands or feet)."
The GUE standard for GUE Fundamentals reads, "Demonstrate good buoyancy and trim, i.e. approximate reference is a maximum of 30 degrees off horizontal while remaining within 5 feet/1.5 meters of a target depth."