Local industry groups have questioned the need and urgency of building a second regasification terminal.
"As the storage costs go down and it becomes more cost-competitive, I think you'll see us doing a lot more storage in the future," Pattern Energy CEO Mike Garland said recently.
Legislation includes a US$400mn capital injection for Chile's 100% state-owned energy firm.
A roundup of Brazilian power sector news.
Changes to the process include seasonal supply blocks, multi-phase awarding of projects and a doubling of bid bonds required to participate.
The Brazilian renewable energy company will receive US$93mn for the sale, plus US$15mn in compensation for the sharp fall in TerraForm Global's share price following the financial collapse of its parent firm SunEdison.
The Brazilian firm will not be allowed to bid in public works processes for a year, as the company is under investigation over alleged corruption practices.