company is needed at the beginning of every programme. The networks must also air an 'institutional message' daily at 21:00, inviting children 12 years of age or less to "not to stay exposed to contents which have no essentially child[-oriented] nature."Comisión Nacional de Televisión, Artículo 4o. Horario de Emisón cel Artículo Institucional – Acuerdo 4 de 1997 , 13 February 1997 A message must be broadcast at 22:10, Monday through Friday, (22:30 Saturdays and Sundays) stating to viewers that the adult fringe has started. Most networks opt to display a scrolling text message instead. The ratings are as follows: Todos (all audiences) – daily, from the hours of 07:00–21:30; Infantil (children) – Monday through Friday from 16:00–17:00, and Saturdays and Sundays from 08:00–10:00; Familiar (family) – Monday to Friday from 07:00–16:00 and 17:00–22:10, and Saturdays and Sundays 07:00–08:00 and 10:00–22:30, respectively. Adultos (adult audiences) – Programming dubbed with this classification run through the remaining time slots not specified by the Infantil and Familiar fringes. Pornography is prohibited from being transmitted over the air in Colombia, even in the adult fringes. Croatia In Croatia, television networks show the rating during the broadcast. The Hrvatska Radiotelevizija (Croatian Radiotelevision) channels, RTL Televizija, RTL 2, Nova TV and Doma TV all display warnings before a broadcast not meant for a general audience. Broadcasts meant for all audiences do not have a rating. With that in mind, the rating system is the following: 12 - Content suitable for children of 12 years of age or older. 15 - Content suitable for teens of 15 years of age or older. 18 - Content suitable for adults of 18 years of age or older. Cyprus In Cyprus, television networks displays warnings before a broadcast not meant for a general audience. Broadcasts meant for all audiences do not have a rating. With that in mind, the rating system is the following: K - Content suitable for all viewers. 12 - Content suitable for children of 12 years of age or older. 15 - Content suitable for teens of 15 years of age or older. 18 - Content suitable for adults of 18 years of age or older. (Broadcast allowed from 1:00 to 6:00) Czech Republic On Czech television, programmes with potentially shocking or harmful content could air only between 10:00pm and 6am and with a star-shaped marker on either corner of the screen indicating it was for adults.