The aerospace manufacturer’s largest union said it would put the contract to a vote on Monday by its 33,000 members, who rejected two earlier agreements.
Normally confidential contracts show that U.S. zoos are accepting increasingly strict terms governing panda cams and public statements.
The group that represent port terminal operators said the International Longshoremen’s Association was refusing to negotiate a new contract before a Monday deadline.
The agreement, if ratified, will cover 1,600 workers making batteries for General Motors in Ohio. The union said it would be a model for efforts elsewhere.