The sheriff, deputy sheriffs and other peace officers shall enforce the provisions of this article and may approve and register such brands and labels intended for use under the provisions of this article as may be submitted to them for that purpose and as may in their judgment conform to the requirements of this article. But in any prosecution under this article the fact that any brand or label involved in the prosecution has not been submitted to the sheriff, a deputy sheriff or a peace officer to whom there is presented, or who in any way procures, satisfactory evidence of any violation of the provisions of this article shall cause appropriate proceedings to be commenced and prosecuted, without delay, for the enforcement of the penalties in such cases herein provided.