code of practice
noun1
A set of guidelines and regulations to be followed by members of some profession, trade, occupation, organization etc.; does not normally have the force of law.
- The Group has recently concentrated on two main objectives, the implementation of a Code of Practice on minor station improvements and the preparation of a stock list of approved items of equipment for railway stations.1962 October, Brian Haresnape, “Focus on B.R. passenger stations”, in Modern Railways, page 252: