Another way to abolish random rule in Dollet is use this method:
Final Fantasy VIII Side Quests: Abolishing the Random Rule in Dollet - Jegged.com
Success rate is 100%.
I remember 1 time I accidentally abolished elemental rule in dollet (after abolish random rule of course). If memory serves, rest at Dollet hotel and then ask the girl in green outfit to play card, she will abolish elemental rule . And Dollet only has Open rule left. Yeah.