"You may be required to transfer from one site to another on the instruction of the Employer."
"You may be required to transfer from one work place to another on the instructions of Employer in accordance with the provisions of the appropriate Working Rule Agreement referred to above."
"You may be required to transfer from one site to another on the instruction of the Employer."
"You may be required to transfer from one work place to another on the instructions of Employer in accordance with the provisions of the appropriate Working Rule Agreement referred to above."