Genmei says that this was done based on 'the code which should not be modified as long as the universe exists and as long as the sun and the moon shed light.'
これは天智天皇が「天地とともに長く日月とともに遠く、改めない常の典と立て賜い、敷き賜える法」にもとづくのだと元明は言う。