An increase in emissions from operational or physical changes at an existing facility authorized by a flexible permit is insignificant, for the purposes of minor new source review under this subchapter, if the increase does not exceed either the emission cap or individual emission limitation. This section does not apply to an increase in emissions from a new facility or to the emission of an air contaminant not previously emitted by an existing facility.
30 Tex. Admin. Code § 116.718