All private and public schools as defined in Ch. 115, Wis. Stats., located within the Village of Edgar are exempt from obtaining a license hereunder when instructing pupils in sex education as part of its curriculum. All licensed medical care or professional nursing care facilities located within the Village of Edgar, and agents of the Village of Edgar and all town, county, state and federal departments and agencies are exempt from obtaining a license hereunder when engaged in the providing of medical care or human growth and development education.