I REFER to Ms Sarah Chan's letter headlined, 'Unacceptable rise in fares' (South China Morning Post, November 29). The last fare increase of green minibus (GMB) route 50K was in June, 1991. Since some villagers did not pay the approved fares until June, 1993, it may give Ms Chan a wrong impression that the last fare increase was in 1993. The recent fare increase of GMB route 50K was implemented on November 13 this year. The increase is justified taking into account the increase in operating costs over the period from June 1991 to November 1993. Though the accumulated inflation rate for the period is about 32 per cent, the increase of the full fare from $3 to $3.50 represents only an increase of 16.7 per cent, which is much lower than the accumulated inflation rate. The new approved section fare from Pui Kee Garage to Hang Tau Village and the student fare are both $2.50. However, we noticed that during the first two days after the implementation of the new fares, the concerned GMB operator charged the section fare and the student concessionary fare at $3. We immediately warned the operator and stopped this unauthorised practice. We will continue to closely monitor the service of GMB 50K and will take further appropriate action as required. In the course of processing the recent fare increase application, the department had solicited the views of Hang Tau villagers and had been advised that they would accept the new fare of $3.50. We also notified the villagers through their Village Representatives of the new fares before implementation.