The tax credits authorized by this chapter for the substantial rehabilitation of qualified structures shall not be available to owners of qualified structures that submit an application and rehabilitation plan after May 15, 2016. No action or inaction on the part of the Legislature shall reduce or suspend the tax credits authorized by this chapter in any past or future calendar year with respect to a qualified structure if the owner thereof submits an application and rehabilitation plan with the commission and the commission reserves an allocation for a tax credit on or prior to May 15, 2016, even if the qualified structure is placed into service after May 15, 2016, and shall not affect the owner of a qualified structure if the commission has reserved an allocation for a tax credit on or prior to May 15, 2016.