The Omnibus Appropriations Act released by U.S. Congress calls for airlines to be more transparent about fees charged when booking a ticket.

The spending bill, covering the 2018 fiscal year, isn’t law yet; if it passes as stands, though, it will address baggage fees, seat upgrade fees and insurance fees tied to airline tickets. The language does not carry the force of law but is a clear signal from Congress.

The bill states, “The department has, in recent years initiated a process to establish more transparency in displaying the total prices of airfare tickets and related charges. Whether consumers are purchasing directly from the airlines or through ticket agents, consumers should have clear and accurate pricing information when choosing among various air transportation options.”

Fees are sometimes difficult to assess when searching for fares; consumers may be unable to determine the true cost of travel when comparing prices. Congress seeks to issue guidelines guaranteeing greater transparency.

“As a result, all the charges should be clear to the consumer, at the time of the initial search, and the anticipated total charges fully disclosed,” states the language in the report.