Tata Power Company today filed its annual revenue requirement for FY06 with the Maharashtra Electricity Regulatory Commission (MERC) proposing to maintain tariffs at the FY05 level.According to a release issued to the BSE today, the company has successfully managed to contain the rise in tariff due to adoption of 3SCR (speedy, significant and sustainable cost reduction) initiative to achieve continuous reduction in fuel costs and operation & maintenance expenses."The company has also petitioned MERC to address the issue of the regular drawl by Reliance Energy at the Borivali 220 kV interconnection, which, in essence, is a standby interconnection point, failing which the company will be constrained to effect an increase in tariff of about 2.4% in FY06. The rise in tariff will be mainly through increase in maximum demand charges," the release said.