', ▁it ▁follows ▁ded uct ively ▁that ▁A ▁must ▁not ▁kill ▁any ▁other ▁human ▁being . ▁K elsen ▁calls ▁this ▁a ▁' static ' ▁order . ▁An ▁order ▁of ▁positive ▁law , ▁he ▁maintain s , ▁is ▁not , ▁or ▁not ▁cent r ally , ▁like ▁that . ▁Although ▁it ▁forms ▁a ▁hierarchy , ▁it ▁is ▁' dynamic ', ▁in ▁that ▁its ▁ordering ▁principle ▁is ▁author isation . ▁Each ▁relatively ▁' high er ' ▁norm ▁author ises ▁someone ▁( an ▁individual ▁or ▁an ▁organ , ▁primarily ▁of ▁the ▁state ) ▁to ▁create ▁further ▁and ▁relatively ▁' lower ' ▁norm s . ▁In ▁this ▁is ▁found ▁the ▁specific ▁characteristic ▁of ▁positive ▁law , ▁hence ▁of ▁all ▁law , ▁that ▁it ▁regul ates ▁its ▁own ▁creation . ▁Even ▁though ▁positive ▁legal ▁norm s ▁do ▁commonly ▁contain ▁elements ▁of ▁general ity , ▁those ▁elements ▁are ▁not ▁central ▁to ▁the ▁relation ▁between ▁a ▁higher ▁and ▁a ▁lower ▁norm . ▁This ▁is ▁a ▁relation ▁of ▁legal ▁' valid ity ' ▁( not ▁to ▁be ▁confused ▁with ▁logical ▁valid ity ), ▁which ▁is ▁that ▁the ▁creation ▁of ▁the ▁lower ▁norm ▁has ▁been ▁author ised ▁by ▁the ▁higher ▁norm . ▁Since ▁this ▁moment ▁of ▁creation ▁always ▁involves ▁extr aneous ▁consider ations , ▁K elsen ▁does ▁not ▁need ▁to ▁supp lement ▁his ▁model ▁with ▁a ▁concept ▁of ▁' dis cret ion '. ▁ ▁What ▁has ▁to ▁be ▁consistent ▁in ▁a ▁dynamic ▁order ▁of ▁norm s ▁is ▁only ▁the ▁process ▁of ▁author ising . ▁This ▁process ▁can ▁( and ▁perhaps ▁always ▁does