(a) If you close your municipal waste combustion unit but will reopen it prior to the applicable final compliance date in table 1 of this subpart, you must meet the increments of progress specified in §62.15040.

(b) If you close your municipal waste combustion unit but restart it after the applicable final compliance date in table 1 of this subpart, you must complete the emission control retrofit and meet the emission limits and good combustion practices on the date your municipal waste combustion unit restarts operation.