Section 204.320  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, that 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.