MEXICO CITY (AP) — Mexico’s Senate debated the final pieces of legislation Wednesday needed to enact a dramatic expansion of the role of foreign and private companies in the state-run oil industry.

The Senate was expected to approve the final packages of laws to regulate private oil and gas drilling that is being allowed for the first time since the industry was nationalized 76 years ago. The overhaul is supported by the governing Institutional Revolutionary Party, the conservative National Action Party and a smaller party that together can form a majority.