For those who cannot craft their own runes, law running can be a very effective way to get law runes. In law running, a player travels back and forth from a bank to the Law altar in Entrana, supplying runecrafters with 26 unnoted pure essence in exchange for law runes, noted essence, or both. The nearest bank is in Draynor Village. The runecrafter gains free and fast experience, while the runner gains profit from the law runes given to them by the runecrafter.
The official world for running laws on Oldschool Runescape is world 341.