O Vvedenii Instruktsii V Deistvie -

If this replaces an old rule, point 4 ensures there is no legal overlap.

приказ от « » __________ 20 г. № _______ «[Название старого приказа/инструкции]» с момента вступления в силу новой Инструкции. o vvedenii instruktsii v deistvie

Clearly states when the rules start applying. If this replaces an old rule, point 4

Explains why the instruction is being introduced (e.g., to improve safety or comply with new laws). If this replaces an old rule