The original 12-member agreement, known as the Trans-Pacific Partnership (TPP), was thrown into limbo early last year when Trump withdrew from the deal just three days after his inauguration in a bid to protect U.S. jobs.
The 11 remaining nations, led by Japan and Canada, finalized a revised trade pact in January.
Trump has also threatened to dump the North American Free Trade Agreement unless the other two members of the pact, Canada and Mexico, agree to provisions that Trump says would boost U.S. manufacturing and employment. He argues that the 1994 accord has caused the migration of jobs and factories southward to lower-cost Mexico.
The revised agreement, to be signed at 3 p.m. (1800 GMT) Thursday, eliminates some requirements of the original TPP demanded by U.S. negotiators. Those include rules ramping up intellectual property protection of pharmaceuticals, which governments and activists of other member nations worried would raise the costs of medicine.
