(a) The director shall notify the Republic of Mexico and every state which is contiguous to this state whenever any of the following occurs:

1. (1) Any hazardous wastes listed pursuant to Section 25140 is restricted as to land disposal in the state.
2. (2) A hazardous waste regulated under the Resource Conservation and Recovery Act of 1976, as amended (42 U.S.C. Sec. 6901 et seq.), is restricted as to land disposal in the state on a more accelerated schedule than that implemented by the Environmental Protection Agency.
3. (3) The state takes any other action to restrict wastes as to land disposal, including banning or increasing disposal fees on specific categories of hazardous waste.
4. (4) The department or a state or federal agency requires the closure of, or curtailment of operations at, any offsite hazardous waste land disposal facility currently operating pursuant to a grant of interim status issued pursuant to Section 25200.5 or a final permit issued pursuant to Section 25200.

(b) When providing a notice pursuant to subdivision (a), the director shall send a letter by registered mail to a public official in the Republic of Mexico and in each state who the director determines to have responsibility for hazardous waste regulation. The letter shall include all of the following:

1. (1) A description of the action taken in the state and documentation as to why this state felt it necessary to take the action to protect the public health and the environment.
2. (2) Specific information on treatment alternatives available to reduce, recycle, treat, or destroy the hazardous wastes affected by the action.
3. (3) The availability of the treatment capacity in this state, and the costs of that treatment.
4. (4) Information as to how the state or Mexico could develop comparable treatment systems.
5. (5) A statement that it is not the intent of the citizens of this state to transfer their hazardous waste problems to the Republic of Mexico or to other states.