In Chile it is required.
According to the Chilean Constitution the Navy has absolute jurisdiction over everything involving the ocean (from the highest high tide mark down and including to the limit of the upper edge of the sand on beaches). According to the Navy all divers are required to have an appropriate C-card for the diving you will be doing (recreational, "commercial" fishing or commercial diving).
Up until July 19, 2012, that meant having a card issued by the Chilean Navy which requires a written and practical exam and a medical form (physical) signed by a doctor. The recreational card is only valid for 2 years and renewable with a renewed medical form. There are at least two levels for recreational divers: autonomos sport diver and specialist. The first is basically a OW or AOW equivalent, but in order to use any tools underwater (such as a camera) you are required to carry the specialist card. CMAS has also been in Chile for a long time. I'm not sure if there is reciprocity between them, but as far as I know, most (if not all) CMAS instructors also offer Navy cards to their students.
On July 19 the Navy signed an agreement of reciprocity with PADI Americas to recognize PADI cards in Chile and the Chilean Navy's "autonomous recreational diver" card is to be recognized by PADI centers as the equivalent of AOW, at least that's what the Navy's website says. Here's a link to the announcement on the Navy's website: Directemar - AUTORIDAD MARÍTIMA FIRMÓ CONVENIO DE RECONOCIMIENTO INTERNACIONAL DE BUCEO DEPORTIVO .
Basically the only thing that the agreement changed is that now PADI cards are recognized in addition to the Navy's. Then Navy cards are still offered.
As far as I know the punishment for diving without a card is the confiscation dive gear and possible fines.
According to the Chilean Constitution the Navy has absolute jurisdiction over everything involving the ocean (from the highest high tide mark down and including to the limit of the upper edge of the sand on beaches). According to the Navy all divers are required to have an appropriate C-card for the diving you will be doing (recreational, "commercial" fishing or commercial diving).
Up until July 19, 2012, that meant having a card issued by the Chilean Navy which requires a written and practical exam and a medical form (physical) signed by a doctor. The recreational card is only valid for 2 years and renewable with a renewed medical form. There are at least two levels for recreational divers: autonomos sport diver and specialist. The first is basically a OW or AOW equivalent, but in order to use any tools underwater (such as a camera) you are required to carry the specialist card. CMAS has also been in Chile for a long time. I'm not sure if there is reciprocity between them, but as far as I know, most (if not all) CMAS instructors also offer Navy cards to their students.
On July 19 the Navy signed an agreement of reciprocity with PADI Americas to recognize PADI cards in Chile and the Chilean Navy's "autonomous recreational diver" card is to be recognized by PADI centers as the equivalent of AOW, at least that's what the Navy's website says. Here's a link to the announcement on the Navy's website: Directemar - AUTORIDAD MARÍTIMA FIRMÓ CONVENIO DE RECONOCIMIENTO INTERNACIONAL DE BUCEO DEPORTIVO .
Basically the only thing that the agreement changed is that now PADI cards are recognized in addition to the Navy's. Then Navy cards are still offered.
As far as I know the punishment for diving without a card is the confiscation dive gear and possible fines.