Ind. Code § 35-45-4-1 – Public indecency

(a) A person who knowingly or intentionally, in a public place:
1. (1) engages in sexual intercourse;
2. (2) engages in other sexual conduct (as defined in IC 35-31.5-2-221.5 );
3. (3) appears in a state of nudity with the intent to arouse the sexual desires of the person or another person; or
4. (4) fondles the person's genitals or the genitals of another person;
  commits public indecency, a Class A misdemeanor.
(b) A person at least eighteen (18) years of age who knowingly or intentionally, in a public place, appears in a state of nudity with the intent to be seen by a child less than sixteen (16) years of age commits public indecency, a Class A misdemeanor.
(c) However, the offense under subsection (a) or (b) is a Level 6 felony if the person who commits the offense has a prior unrelated conviction under subsection (a) or (b).
(d) As used in this section, "nudity" means the showing of the human male or female genitals, pubic area, or buttocks with less than a fully opaque covering, the showing of the female breast with less than a fully opaque covering of any part of the nipple, or the showing of covered male genitals in a discernibly turgid state.
(e) A person who, in a place other than a public place, with the intent to be seen by persons other than invitees and occupants of that place:
1. (1) engages in sexual intercourse;
2. (2) engages in other sexual conduct (as defined in IC 35-31.5-2-221.5 );
3. (3) fondles the person's genitals or the genitals of another person; or
4. (4) appears in a state of nudity;
  where the person can be seen by persons other than invitees and occupants of that place commits indecent exposure, a Class C misdemeanor.
  As added by Acts 1976, P.L.148, SEC.5. Amended by Acts 1977, P.L.340, SEC.76; P.L.189-1984, SEC.1; P.L.215-1997, SEC.1; P.L.121-2000, SEC.1; P.L.123-2003, SEC.2; P.L.158-2013, SEC.524; P.L.142-2020, SEC.71.