The Law of 25s is the primary difference between Discordians and Accordians. While the original doctrin of Discordianism (the Law of fives) held that all things are related to fives, the wise and wonderful Father Nemo Proprius noted during The Accord that the rule was self effacing, since all fives should also happen in fives, and hence be in 5 5's, or 25's (25s). Accordians hold the law of 25s above all else and it is never wrong.
See also Law of fours