Chief Executive Tung Chee-hwa is today expected to give an assurance that the stability of the civil service will not be jeopardised by his landmark move to implement a ministerial system. In a 45-minute detailed briefing on the new framework to the Legislative Council today, Mr Tung is also expected to say he has not finalised the line-up of his ruling team. Senior civil servants and unions have expressed concern over civil service neutrality after it was disclosed last week that the next Secretary for Civil Service will become a political appointee - like the other 13 principal officials. Some policy secretaries also raised concerns at a meeting with Mr Tung on Monday about the functioning of existing bureaus in light of the proposed restructuring of 16 bureaus into 11 after July 1. An informed source said: 'Different concerns have been raised. Mr Tung should now fully understand officials want an early announcement on the accountability of officials.' 'But I don't think Mr Tung will release the names any time before June.' The source said Mr Tung had assured the policy secretaries he 'did not have a list of names'. One of the major principles of the accountability system, the source said, was the preservation of a stable civil service. 'Civil servants are worried about a lot of things such as job security and promotion prospects. Some are frightened by political demands to give ministers the power to sack civil servants. This is not the government position. We now have the right balance,' he said. The source referred to a requirement that the Secretary for Civil Service must be chosen from within the civil service. Mr Tung is expected to explain measures to allay fears that the civil service system will be politicised under the new system. These include an arrangement for the civil service minister, who would cease to be a civil servant if he joined the system, to return to the bureaucracy after his appointment ended. He will also brief members on conduct requirements, post-term restrictions on the employment of ministers, and the rationale of restructuring policy bureaus.