Notice that the word "adhere" is always there, when the law could have been written with the exact same wording but with the word "present" instead of "adhere". Why ?
"present"
Like blowing snow across a cold flat surface that does not accumulate on such surface
"adhere"
Where it does accumulate
If you start your taxi (after dispatch) and the snow has already accumulated on the wing even in patches, it has "adhered" and you should be in violation of a hard rule if you dispatched that way.
A clean wing/engine etc, at dispatch, that subsequently accumulates snow or ice falls under a different operational SOP (one that minimizes the effect)
A wing/engine that accumulates ice in the air falls under a design regulation as well as an operational SOP