From North Dakota Standard Specifications for Road and Bridge Construction:
"Each flagger shall be furnished with the booklet, Flagging Handbook, and shall observe the rules and regulations contained therein. The Contractor shall obtain copies of the Flagging Handbook from the Department.
The Contractor is responsible for providing trained flaggers. All flaggers must view a flagging video training tape and pass a flagging written examination before performing flagging on the project. The Contractor will acknowledge in writing, before any flagging work begins on the project, that all flaggers will have viewed a flagging video tape and passed a written examination before performing flagging on the project."