Except as otherwise provided by this chapter, the Secretary shall promulgate final regulations for the implementation of this chapter within 24 months after December 3, 1993. All regulations promulgated pursuant to this chapter shall be developed by the Secretary with the participation of the affected Indian tribes.

Nothing in this chapter shall be construed to diminish or expand the trust responsibility of the United States toward Indian trust lands or natural resources, or any legal obligation or remedy resulting therefrom.

If any provision of this chapter, or the application of any provision of this chapter to any person or circumstance, is held invalid, the application of such provision or circumstance and the remainder of this chapter shall not be affected thereby.

Nothing in this chapter shall be construed to affect, modify, diminish, or otherwise impair the sovereign immunity from suit enjoyed by Indian tribes.