If the tribal government uses any applicable fuels purchased for essential governmental purposes, there is no obligation for taxes on leaking underground storage tanks. "IRC section 4041(g) states "no tax shall be imposed under this section … (2) with respect to the sale of any liquid for the exclusive use of any State, any political subdivision of a State, or the District of Columbia, or with respect to the use by any of the foregoing of any liquid as a fuel."
