Except for persons duly authorized by this article, no person shall entice any properly licensed dog into any enclosure for the purpose of taking off his collar or tag, or, for such purpose, decoy or entice any dog out of the enclosure or house of its owner or possessor, or seize or molest any dog which is held or led by any person, or bring any dog into the City for the purpose of impounding and killing the same. (1967 Code §3-19)