Ill. Admin. Code tit. 35, § 217.466
d) To the extent that allowances remain in the new source set-aside after any allocation pursuant to subsection (b) of this Section, the Agency shall allocate any such remaining allowances pro-rata to the owner or operator of the budget units listed in Appendix E of this Part to the extent a whole allowance may be allocated to any such owner or operator. The Agency will make such allocation by April 15 of each year. If there are insufficient allowances to allocate a whole allowance to any such owner or operator of a budget unit listed in Appendix E of this Part, such allowances shall be retained by the Agency in the new source set-aside. Any such allowances retained in the new source set-aside shall be accumulated in the new source set-aside and may either:
For each control period, the Agency will allocate the total number of NOx allowances in the Subpart U NOx Trading Budget apportioned to budget units under Section 217.460 of this Subpart, subject to adjustment as provided in this Subpart. These allocations will be issued as provided in subsections (a) and (b) of this Section, as follows:
(Source: Added at 25 Ill. Reg. 5914, effective April 17, 2001)