Stamping tsim qauv

(1) Cov tsim stamping qhov chaw yuav tsum ua raws li cov khoom siv thiab kev ua haujlwm, thiab tuaj yeem sib dhos thiab kho tau yooj yim.

(2) Cov khoom siv stamping tsim yuav tsum muaj txiaj ntsig zoo los txhim kho kev siv cov khoom siv hlau, txo qhov ntau thiab qhov tshwj xeeb ntawm cov ntaub ntawv, thiab txo qis kev noj cov khoom siv. Siv cov khoom siv uas tsis tshua muaj nqi nyob qhov twg los xij, thiab ua kom cov khoom seem dawb li sai tau thiab tsis muaj pov tseg tsawg.