Any repeal or amendment made by this Act shall not affect or impair any of the following: suits pending or rights existing at the time this Act takes effect; any grant or conveyance made or right acquired or cause of action now existing under any Section, Article, or Act repealed or amended by this Act; the validity of any bonds or other obligations issued or sold and constituting valid obligations of the issuing authority at the time this Act takes effect; the validity of any contract; the validity of any tax levied under any law in effect prior to the effective date of this Act; or any offense committed, act done, penalty, punishment, or forfeiture incurred or any claim, right, power, or remedy accrued under any law in effect prior to the effective date of this Act.