Anyone concerned in the violation of this chapter whether directly committing the act or omitting to do the thing constituting the offense, or who aids or abets the same, and whether present or absent, and anyone who directly or indirectly counsels, encourages, hires, commands, induces or otherwise procures another to commit such offense, is and shall be a principal under the terms of this chapter and shall be proceeded against and prosecuted as such. (Prior code § 14.08.240.)