Declining demand for gasoline and other petroleum products as well as changes in the legal framework governing the industry may prompt the closure of gas stations and refineries in the months ahead.

Under the revised Fire Service Law, by the end of the month, gas stations that installed storage tanks 40 or more years ago will be required to either refurbish or replace them.

The measure is a costly requirement for owners of small stations and might inconvenience drivers whose neighborhood stands are shut down.