The ruling Liberal Democratic Party endorsed a set of bills Tuesday to rewrite laws governing Nippon Telegraph and Telephone Corp. that would lead to looser-than-planned regulations on the dominant telecom carrier, LDP officials said.

The move set the stage for the Public Management, Home Affairs, Posts and Telecommunications Ministry to submit the bills to the Diet pending Cabinet approval due next Tuesday, they said.

The legislation would impose regulations on NTT's two local phone service units, NTT East Corp. and NTT West Corp., as well as mobile phone service providers with a market share of more than 25 percent, such as NTT DoCoMo Inc., the mobile phone arm of NTT, in a bid to ensure fair competition.