The rules according to the IAWA read:
B26 ONE HAND BENT PRESS
The bar should be cleaned to the shoulder in one movement. During the pull to the shoulder the trunk can bend sideways and the elbow can rest on the hip. Once the bar is in position at the shoulder, and gripped at the centre, it should be elevated to arms length overhead by means of lateral pressure. The bar must not touch the hip during the press. At the completion of the lift the lifter will stand erect.
Causes for Failure:
1 Touching the floor with any part of the body other than the feet.
2 Touching the hip with the bar during the press.
3 Failure to complete the lift, standing erect and motionless, with the legs and arms straight, and feet in line with the lifters front aspect.
4 All other causes for failure are the same as for the one hand clean and one hand clean and jerk.
No mention of the clavicle there. So I go to the one hand clean and jerk:
B25 ONE HAND CLEAN AND JERK
The rules for the two hands clean and jerk apply except that the lift is done with either the left or right hand only. An optional grip is used, and the bar is raised to the commensurate shoulder as the lifting arm, in a single movement. The bar must not touch any part of the legs or trunk below the line of the nipples. In receiving the bar at the shoulder it should not make contact with or rest, on the opposite shoulder or chest. The centre of the sternum is used as the line of indication. The free hand may be supported on the thigh or knee of either leg, but must not touch the lifting surface, lifting arm or bar during the lift. With a single distinct effort the lifter will jerk the bar to arms length above the head. The signal to replace the bar will be given on completion of the lift, when the lifter is erect and motionless with the feet on a parallel plane to the torso.
Causes for Failure:
1 Touching the lifting surface, bar or lifting arm with the free arm.
2 Touching the bar with the legs or trunk below the line of the nipples.
3 Touching the chest or shoulder with the bar, on the opposite side to the lifting arm.
4 Allowing the bar to rise above the lower level of the ear, when adjusting the grip prior to the jerk.
5 Failure to control the bar and fix it motionless, at completion.
6 All other causes for failure are the same as for the two hands clean and jerk.
Still not seeing mention of the clavicle. So, off to the two hand clean and jerk, as mentioned in the rule above:
A5 CLEAN AND JERK
From the same start position as for the snatch, the bar should be cleaned to the chest in a single
movement, taking the bar from the platform to the shoulders using either: a squat clean or a power
clean. During the pull the bar may slide along the legs and lap but should not touch the chest before
the final position. During the clean, the elbows and upper arms should not come into contact with the
knees or thighs. The bar should come to rest on the clavicles or chest, above the nipples with the arms
full bent. The bar may be adjusted between the clean and the jerk, allowing the thumbs to be
withdrawn, the bar to be lowered if impeding the breathing and to change the width of the grip. The
feet should return to the straight line, with the legs straight and the lifter recovering in their own time,
before performing the jerk. To jerk, the lifter bends the legs and extends them as well as the arms, to
bring the bar to full extension overhead, in one movement. The lift must not finish with a press out,
and the lifters feet should once again come to finish in line with legs and arms fully extended. Only
one attempt at the jerk will be allowed . When the lifter has finished the lift, fully extended, feet on an
even plane, and motionless, the official will signal to return the bar to the platform.
Causes for Failure:
1 Pulling from the hang.
2 Using more than one movement in the clean.
3 Touching the lifting surface with any part of the body other than the feet.
4 The bar coming into contact with the trunk before the final Clean position.
5 Elbows or arms touching knees or thighs.
6 Stepping off or out of the marked lifting area, with any part of the foot during the lift.
7 More than one attempt at the jerk
8 Uneven extension of the arms.
9 A pause during the jerk, and / or finishing with a press out.
10 Unlocking of the arms after the jerk, prior to the referees signal.
11 Failure to assume the correct finish position, arms and legs extended, bar held motionless, and feet in line and parallel to the plane of the trunk
12 Lowering the bar before the referees signal to replace the bar, or dropping the bar afterwards.
So, that is where the clavical is mentioned, though it takes a little digging to get to it. For what it is worth.
I'm the lyrical Jesse James