Abstract: In a system of transmission and reception of radio or television data with a head-end part transmitting data via two channels and receivers of radio or television data having identifiers, the head-end part comprises an interface for transmitting audio/video data and an access rights control block having an interface for transmitting services information (SI), programming package contents and identifiers of the receivers' packages. In turn, the receivers comprise an execution block, which controls access of the receivers to specific channels or programs on the basis of the content of the programming package corresponding to the package identifier of a given receiver.