I thought this too that the crease at the hip needs to be level with the top of the knee or below but fuck knows these days
Yep, that was the old rule for this, make sure the hip crease is below the top of the knee. It doesn't need to be a lot, just enough to break below the line -
Causes for disqualification of a Squat:
1. Failure to observe the Chief Referee’s signals at the commencement or completion of a lift.
2. Double bouncing at the bottom of the lift, or any downward movement during the ascent.
3. Failure to assume an upright position with the knees locked at the commencement or completion of the lift.
4. Stepping backward or forward or moving the feet laterally. Rocking the feet between the ball and heel is
permitted.
5. Failure to bend the knees and lower the body until the top surface of the legs at the hip joint is lower than the
top of the knees, as in the diagram.
6. Contact with the bar or the lifter by the spotter/loaders between the Chief Referee’s signals in order to make
the lift easier.
7. Contact of the elbows or upper arms with the legs. Slight contact is permitted if there is no supporting that
might aid the lifter.
8. Any dropping or dumping of the bar after completion of the lift.
9. Failure to comply with any of the items outlined under Rules of Performance for the squat.
.
