The tax imposed by this article shall be in addition to all other licenses and taxes levied by law or ordinance and their imposition is a condition precedent to the right of any person to engage or continue in any such business, profession, trades, calling or other activity within this Town. A person exercising a privilege taxable under this article, subject to the payment of all licenses and charges which are conditions precedent to exercising the privileges taxed may exercise the privilege in this town for the tax year upon the condition that he shall pay the tax accuring under this article. (Passed 10-23-56.)