A new state law requires cities, counties and fire departments be told ahead of time when an oil train is coming through their community.

But it may be the summer of 2017 before they start getting such a heads-up.

The state Department of Ecology is working to determine what details on the type and source of oil being shipped must be in the notices to help communities prepare for a derailment, spill or other type of accident.

“They really want to know the nature of the products getting transported through their area. We have to figure out what’s feasible to require,” said David Byers, response manager for the agency.