Fuel distributors may no longer supply fuel oil to an underground tank that is not registered with the Technical Standards and Safety Authority (TSSA).

To ensure uninterrupted fuel oil supply, tank owners must complete the TSSA's Underground Fuel Oil Application Form and may be required to upgrade their tank with specific leak and spill prevention equipment depending on the age of the tank.

Upon approving an application form, the TSSA will assign a registration number to the tank. The tank owner must provide the registration number to a fuel distributor to ensure uninterrupted fuel supply.

Problems with underground fuel oil tanks may present problems when applying for homeowner's insurance and, in extreme cases, may adversely affect real estate transactions themselves.