(a) The requirements of this division apply to existing municipal solid waste landfills (MSWLFs) for which construction, reconstruction, or modification was commenced on or before July 17, 2014, except for landfills exempted under §113.2406 of this title (relating to Exemptions, Alternate Emission Standards, and Alternate Compliance Schedules).(b) Physical or operational changes made to an existing MSWLF solely to comply with these emission guidelines are not considered a modification or reconstruction and would not subject an existing MSWLF to the requirements of a standard of performance for new MSWLFs (such as 40 Code of Federal Regulations (CFR) Part 60, Subpart XXX).(c) The requirements of this division do not apply to landfills which are subject to 40 CFR Part 60, Subpart XXX (Standards of Performance for Municipal Solid Waste Landfills that Commenced Construction, Reconstruction, or Modification after July 17, 2014).(d) The requirements of this division do not apply until the implementation date specified in §113.2412 of this title (relating to Implementation Date and Increments of Progress).