No person, firm or corporation, or any association whatsoever, except traveling salesmen engaged in selling exclusively to wholesale and retail merchants shall sell, barter or give away or keep for such purposes, or solicit or take orders therefor, any of the preparations, compounds, bitters, elixirs or extracts mentioned in Section 97-31-5, until a permit so to do shall be granted by the mayor and board of aldermen or mayor and councilmen of any incorporated city, town or village within which said business is or may be proposed to be carried on, or the board of supervisors of the county if the same is or proposed to be carried on without corporate limits of any city, town or village. Such permits may be granted by said authorities upon written application of the person, firm or corporation desiring to deal in such preparation, and the permit, if granted, shall be in writing, shall be spread at large upon the minutes of the proceedings of the mayor and board of aldermen or councilmen or the board of supervisors, as the case may be, giving the name of the dealer, or dealers, the preparation or commodities which it covers, and shall be for a period of one year from the date of its being granted. The granting of a permit to any person, firm or corporation, to barter, sell, give away, keep for sale, or solicit orders for the sale of same shall be in the discretion of the mayor and board of aldermen or councilmen or the board of supervisors, as the case may be, and they shall likewise have full authority and power, in their discretion, to revoke the same.