Simple answer.. no.. sway may be achieved from a static position, as in a " broken " sway line , there are other e.g. ( sway without swing )
Scrivener taught that sway was virtually absent for man, on 2 and 3 ,moving into the Whisk action ( swing without sway ) .... at best he said, "It is sympathetic ", this falls in line with the prescribed CBM ( and also, worth noting, the ladies sway should be opposite to the Rev.techn. direction ).
Much of this goes to show that there were disagreements in the hierarchy ,that were never resolved .
As len said.. techn. cannot always be exact, as circumstances may change to affect standard ideas .
Would add this caveat.. for exam purposes, it would be wise to adhere to current principles .