Federal regulators on Oct. 31 approved a rule that would ban exclusive agreements that cable television operators have with apartment buildings, opening up competition for other video providers that could eventually lead to lower prices.

The Federal Communications Commission unanimously approved the change, which Chairman Kevin Martin said would help lower cable rates for millions of subscribers who live in apartment buildings and other multi-unit dwellings, or about 25 million households. He said the move would particularly help minorities who disproportionately live in multi-unit dwellings.