SYDNEY--A proposed $30 billion-plus gas-export project in Australia's remote Kimberly region has been recommended for approval by regulators if it meets conditions including protection of rare dinosaur footprints.

The Browse liquefied natural gas project, operated by Woodside Petroleum, still needs the blessing of the Western Australia state and federal government before it can proceed.

Lawmakers will take advice from Western Australia's Environmental Protection Authority, which on Monday gave the giant project the green light, as long as it meets 29 "rigorous" conditions including managing any impact on humpback whales, dolphins and turtles.

"The level of complexity in assessing this proposal was unprecedented," EPA Chairman Paul Vogel said in a statement.

It has been recommended that the LNG export precinct shouldn't cross the shore within 900 meters of James Price Point on the Kimberly coast to avoid fossil dinosaur footprints.

Other Browse LNG investors include Chevron Corp. (CVX), Royal Dutch Shell PLC (RDSB), BHP Billiton Ltd. (BHP.AU) and BP PLC (BP.LN).