All construction personnel must abide by on-site work discipline, obey orders, obey instructions, and operate correctly, and must not leave their jobs without authorization.
All construction personnel must abide by on-site work discipline, obey orders, follow command, correct operation, not to leave the job without authorization.
All construction personnel must abide by the on-site work discipline, obey the orders, obey the command and operate correctly. They are not allowed to leave their posts without authorization.