In no case shall any license be held to authorize any two (2) persons to sell under it at one and the same time, or to cover more than one place of business or to authorize auction sales at any other than the regular place of business of the person receiving such license, if he has such regular place; provided, that any auctioneer may by first notifying the clerk, change the location of his place of business, in which case the license shall be held to cover such new place; and provided further, that any licensed auctioneer may temporarily leave his place of business and sell where situated any property which cannot conveniently be moved to such place of business. (R.O. 1959, Ch. 9, Sec. 6)