Mainland television and radio hosts have been banned from using Hong Kong and Taiwanese accents on air. Anybody breaking the rules could lose their job under new rules issued by the State Administration of Radio, Film and Television. The guidelines were released on Tuesday and include standards and requirements covering the way a presenter may dress, style their hair, sound and participate in commercial activities. 'Don't use regional dialects or imitate Hong Kong and Taiwanese accents,' the new rules say. 'Except in situations of special need, radio and TV hosts across the mainland should use standard Putonghua in their programmes.' Mixing 'unnecessary' foreign language with Putonghua was also prohibited. The rules also require hosts to display 'healthy and enterprising images' and to make sure their appearance and presentation is 'in good taste and decorous'. 'Be lively but not frivolous. Sensationalism and cute moves are not allowed,' the guideline say. The document also demands that hosts get permission from their work units before taking part in any commercial activities. Anybody flouting the rules will be disciplined and removed from contention for the Golden Microphone Awards, a contest regarded as the mainland's supreme honour for radio and TV hosts. The rules follow a wave of criticism late last month by state broadcasting officials and China Central Television against 'vulgar phenomena' in broadcasting. Comments on online forums about the issue were overwhelmingly negative, with many saying the rule amounted to dialect discrimination.