Any news on placas?

Does anyone know if the new plates are available yet? Also, a friend told me that we are required to get a 30-day permit until we receive the new plates. The permit cost him $500 pesos. We already paid at the finance office in February and were told to come back for the plates. They never said anything about a 30-day permit. It seems odd that we would have to pay for a 30-day permit after already paying for the new plates. Can anyone confirm or deny? I have been carrying copies of the documents received from the finance office for proof of payment if pulled over. Is that sufficient?