Re: and as a side note trap...

i believe the word you are looking for is precedent. same system as ancient babylon had.

Daniel 6:17
And a stone was brought, and laid upon the mouth of the den; and the king sealed it with his own signet, and with the signet of his lords; that the purpose might not be changed concerning Daniel.

once a law was written it could not be changed, only further enhanced or expounded upon.