Ind. Code § 24-4-4-7
It shall be unlawful for any person, firm, limited liability company, or corporation, by himself or itself, or by his or its agent or servant, or as agent or servant of another, to advertise by any false statement, either oral or written, or to publish or display any false sign, printing, or writing concerning the grade, size, quality, vein or seam, brand or trade name, name of mine in which produced, or origin of such coal or coke sold or delivered, or offered by him, it, or them for sale or delivery. For the purpose of this chapter, the term "size" where used in reference to coal shall be construed to mean the various grades into which coal is screened, namely, lump, block, egg, nut, and screenings, and the size of all such grades of coal must be designated according to the openings in the screens over and through which each such size of coal is made at the place of production. Abbreviations or words, terms, or phrases describing the size, preparation, or origin of coal or coke shall not be included in any advertisement as mentioned in this chapter. Any person, firm, limited liability company, or corporation violating any of the provisions of this section shall be subject to the provisions of section 5 of this chapter.
IC 24-4-4-7