(1) If the department receives notification from the United States internal revenue service that this act or any portion of this act will cause any retirement system to be disqualified for tax purposes under the internal revenue code, or prevent any irrevocable trust from meeting the requirements of section 115 of the internal revenue code, 26 USC 115, then the portion that will cause the disqualification does not apply.

  (2) The provisions of this act are severable. If any part of this act is declared invalid or unconstitutional, that declaration shall not affect the remaining part of this act.