Standing orders must be drafted by employers, consulted with unions, and certified within defined timelines. Employers must prepare draft standing orders within six months, consult trade unions or prescribed worker representatives, and forward drafts to the certifying officer; adoption of a prescribed model standing order is deemed certified unless the certifying officer directs amendments. The certifying officer must notify relevant parties, seek comments, allow hearings, and decide within sixty days whether modifications are required, failing which the draft or modifications are deemed certified; certifiability requires coverage of applicable First Schedule matters and conformity with the Code.