Yes, an Oregon Supervisor (MASTER) Electrician can design ANY electrical system without limitation and without obtaining any additional license as long as it is for a licensed electrical contractor that they are employed by or for themselves if they are a one man shop........It drives the Electrical Engineers in Oregon, insane..!!! In Oregon, a General Supervising Electrician's stamp is equal to an Electrical Engineer's stamp....with the exception that Engineers can design for 3rd parties.....
The Engineers try and fail every 2 years when the legislature convenes to overturn this law......one day I guess they will be sucessful.....