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76 FR 30010

OSM approved an amendment to Montana's regulatory program under SMCRA regarding bond release responsibility periods for water management facilities and other support facilities.

75 FR 79300

SIP Approval: Mississippi (incorporation of nitrogen oxide (NOx) as a precursor to ozone).

76 FR 31241

SIP Approval: Massachusetts (delegation of authority for PSD program)

75 FR 81471

SIP Approval: Minnesota (sulfur dioxide (SO2) emissions).

76 FR 27904

SIP Approval: Indiana (updates to definitions)