Regulatory Text:
Oklahoma SIP-Approved Air Quality Control Regulations as approved by EPA effective 2000-01-03 (OKc48) and 2000-01-07 (OKc49)

As approved by EPA:
November 3, 1999 (64 FR 59629) at 52.1920(c)(48) effective January 3, 2000 (OKc48);

and revised by EPA:
November 8, 1999 (64 FR 60683) at 52.1920(c)(49) effective January 7, 2000 (OKc49).

August 2, 2000 (65 FR 47326) effective August 2, 2000 (OKd01) revised the format
of 40 CFR Part 52, Subpart LL, Oklahoma, for materials submitted by Oklahoma that had
been incorporated by reference (IBR) into the Oklahoma State Implementation Plan (SIP)
but did not change any regulations in the Oklahoma SIP.  The regulations affected had
all been previously submitted by the respective State agency and approved by EPA.