On and after July 1, 1969, every person who owns a vending machine shall have his name and address affixed thereto in a place where it may be seen by anyone using the machine.

Notwithstanding the foregoing, in the event that a person owns more than one vending machine located at the same place, such a person may, as an alternative to the above, post a clearly readable sign containing his name and address in a conspicuous location near the machines.