In an indictment, complaint or affidavit for selling, offering for sale, keeping for sale or otherwise disposing of spirituous, vinous or malt liquors, it is sufficient to charge that the defendant sold, offered for sale, kept for sale or otherwise disposed of spirituous, vinous or malt liquors contrary to law, and in an indictment, complaint or affidavit for selling, offering for sale, keeping for sale or otherwise disposing of prohibited liquors and beverages, it is sufficient to charge that the defendant sold, offered for sale, kept for sale or otherwise disposed of prohibited liquors and beverages. On the trial under a charge in either form, any act of selling in violation of law embraced in the charge may be proved and the charge in each of said forms shall be held to include any device or substitute for any of said liquors.

In any indictment, complaint or affidavit charging that prohibited liquors and beverages have been manufactured, sold, offered for sale, kept for sale or otherwise disposed of, it shall not be necessary to set out the kind or quantity of the prohibited liquors and beverages nor the person to whom such sale or offer to sell or other disposition was made, and in any prosecution for a second or subsequent offense, it shall not be requisite to set forth in the indictment, complaint or affidavit the record of a former conviction, but it shall be sufficient briefly to allege such conviction.

The person purchasing or to whom prohibited liquors and beverages or any of them have been sold or otherwise disposed of shall in all cases be a competent witness to prove the unlawful act.

No person who testifies with respect to any unlawful act under this chapter or other statute for the suppression of the evils of intemperance shall be prosecuted in respect to any act to which he testifies nor shall his evidence so given be used against him in any criminal proceeding.