Roughing the passer

[DrMooreReferee]

2nd and 10 from A's 35.QB A10 tosses a shovel pass to A22 at A's 32 who then spins and throws a backward pass back to A10. A10, while standing at the A 28 yardline, then throws a pass downfield which falls incomplete. After the second pass, B77 roughs A10 by running into him clearly after the ball was away.

My question is this. Can the thrower of a 2nd forward pass be roughed? I believe he can. I think we talked about this last year, but I wanted to make sure. I think that because he's behind the line he can be roughed. I think that ALL other illegal passes would not have that same outcome. Only yje 2nd forward pass thrown from behind the line has this roughing possibility.

Agree?

Oh, and I'm thinking NFHS here. But feel free to chime in with other code if you like.