Commence

Section 203.1100  Commence "Commence," as applied to construction of a major stationary source or major modification, means that the owner or operator has all necessary preconstruction approvals or permits and either has: a)         Begun, or caused to begin, a continuous program of actual on-site construction of the source, to be completed within a reasonable time; or b)         Entered into binding agreements or contractual obligations, which cannot be cancelled or modified without substantial loss to the owner or operator, to undertake a program of actual construction of the source to be completed within a reasonable time.