Top civil servants may face tougher restrictions when seeking jobs after retirement, the secretary for the civil service said yesterday. Joseph Wong Wing-ping's comments came after lawmakers challenged former police commissioner Tsang Yam-pui's appointment as an executive director of NWS Holdings, the services flagship of New World Development, which becomes effective in June. Mr Tsang retired in early December. His predecessors, Eddie Hui Ki-on and Li Kwan-ha, also served in leading business groups after retirement. Retired officials are required to seek the government's approval before taking on another job within two years of retirement. The first six months after retirement are a 'sanitisation period' during which ex-officials are prohibited from taking on a new job. At the Legco public service panel yesterday, lawmakers unanimously criticised the present system. Cheung Man-kwong asked why the government last year rejected only one of 76 applications for employment after retiring from the civil service Lee Cheuk-yan of the Confederation of Trade Unions raised questions over the propriety of retired officials joining large companies. 'This arouses suspicions that senior officials will give special favours to large consortiums so they will have a job there after retiring.'