However, reporters that receive a subpart RR R&D exemption are no longer subject to subpart RR, but rather report CO 2 received under subpart UU. The cease reporting provisions of ?? 98.2(i) do not apply to subpart RR. Rather, once a facility is subject to the requirements of this subpart, including facilities that opt-in to 40 CFR part 98, subpart RR, the owner or operator must continue for each