The board may classify licenses, and may issue licenses to any milk dealer to operate as a milk dealer in a particular municipality only, or in a particular market or markets in the Commonwealth only, but no milk dealer shall, if granted a license under this act at all, be prohibited from acting as a milk dealer in any municipality or in any market in which he was operating upon January second, one thousand nine hundred thirty-four.
31 P.S. § 700j-411