Electronic And Postal Communications (Digital and other Broadcasting Networks) G.N. No. 418 (contd) (d) (e) (f) (g) (h) signal transmission system; point of audio and visual production; customer premise equipment ; customer perception of quality or quality of experience; availability of service. Systems Interoperability 14.-(1) A multiplex operator shall ensure that there is interoperability in the digital broadcasting chain. (2) A Multiplex Operator shall ensure interoperability in the following manner(a) all Free to Air channels shall be accessible without any subscription fees on any digital platform through an integrated digital television or a set top box; (b) the Authority shall type approve set top boxes and integrated digital television for use by consumers to access digital broadcasting services by Content Service providers through Multiplex Operators; (c) all conditional access television channels shall be accessible through a single Set-Top-Box and integrated digital television using mechanisms such as, smart cards, passwords or keys or any other mechanisms compatible with the single receiver system; (d) provide flexibility to content services licensee to change multiplex operator without need for additional interface. (3) Both multiplex operator and content service licensee shall ensure that all the equipment comprised in and contacted to the licensed systems and used in the provision of the licensed services is type approved by the Authority. Set-Top-Box Specifications 15. Any person who intends to assemble, manufacture, maintain, import, distribute or sell integrated digital television, set top box, digital radio receiver or any other customer premise equipment for digital terrestrial broadcasting reception shall apply 44